clearer model variable naming: Deberta
Author: kamalkraj
Pull request: yes

# What does this PR do?

clearer model variable naming: Deberta

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Fixes # (issue)


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [ ] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/master/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
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- [ ] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/master/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/master/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

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Models:

- albert, bert, xlm: @LysandreJik
- blenderbot, bart, marian, pegasus, encoderdecoder,  t5: @patrickvonplaten, @patil-suraj
- longformer, reformer, transfoxl, xlnet: @patrickvonplaten
- fsmt: @stas00
- funnel: @sgugger
- gpt2: @patrickvonplaten, @LysandreJik
- rag: @patrickvonplaten, @lhoestq
- tensorflow: @LysandreJik

Library:

- benchmarks: @patrickvonplaten
- deepspeed: @stas00
- ray/raytune: @richardliaw, @amogkam
- text generation: @patrickvonplaten
- tokenizers: @n1t0, @LysandreJik
- trainer: @sgugger
- pipelines: @LysandreJik

Documentation: @sgugger

HF projects:

- datasets: [different repo](https://github.com/huggingface/datasets)
- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

Examples:

- maintained examples (not research project or legacy): @sgugger, @patil-suraj
- research_projects/bert-loses-patience: @JetRunner
- research_projects/distillation: @VictorSanh

 -->
@gante 

Comments:
_The documentation is not available anymore as the PR was closed or merged._

Deberta-v1
```bash
============================================================================= test session starts =============================================================================
platform darwin -- Python 3.8.9, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 -- /Users/kamal.raj/.virtualenvs/transformers/bin/python
cachedir: .pytest_cache
hypothesis profile 'default' -> database=DirectoryBasedExampleDatabase('/Users/kamal.raj/Documents/GitHub/transformers/.hypothesis/examples')
rootdir: /Users/kamal.raj/Documents/GitHub/transformers, configfile: setup.cfg
plugins: xdist-2.4.0, timeout-2.0.1, dash-2.0.0, hypothesis-6.31.3, forked-1.3.0, typeguard-2.13.2
collected 36 items                                                                                                                                                            

tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_attention_outputs <- tests/test_modeling_tf_common.py PASSED                                        [  2%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_compile_tf_model <- tests/test_modeling_tf_common.py PASSED                                         [  5%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_config PASSED                                                                                       [  8%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_determinism <- tests/test_modeling_tf_common.py PASSED                                              [ 11%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_for_masked_lm PASSED                                                                                [ 13%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_for_question_answering PASSED                                                                       [ 16%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_for_sequence_classification PASSED                                                                  [ 19%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_for_token_classification PASSED                                                                     [ 22%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_forward_signature <- tests/test_modeling_tf_common.py PASSED                                        [ 25%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_generate_with_headmasking <- tests/test_modeling_tf_common.py PASSED                                [ 27%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_headmasking <- tests/test_modeling_tf_common.py PASSED                                              [ 30%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_hidden_states_output <- tests/test_modeling_tf_common.py PASSED                                     [ 33%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_initialization <- tests/test_modeling_tf_common.py PASSED                                           [ 36%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_inputs_embeds <- tests/test_modeling_tf_common.py PASSED                                            [ 38%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_keras_save_load <- tests/test_modeling_tf_common.py PASSED                                          [ 41%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_keyword_and_dict_args <- tests/test_modeling_tf_common.py PASSED                                    [ 44%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_lm_head_model_beam_search_generate_dict_outputs <- tests/test_modeling_tf_common.py PASSED          [ 47%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_lm_head_model_no_beam_search_generate_dict_outputs <- tests/test_modeling_tf_common.py PASSED       [ 50%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_lm_head_model_random_beam_search_generate <- tests/test_modeling_tf_common.py PASSED                [ 52%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_lm_head_model_random_no_beam_search_generate <- tests/test_modeling_tf_common.py PASSED             [ 55%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_load_with_mismatched_shapes <- tests/test_modeling_tf_common.py PASSED                              [ 58%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_loss_computation <- tests/test_modeling_tf_common.py PASSED                                         [ 61%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_model PASSED                                                                                        [ 63%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_model_common_attributes <- tests/test_modeling_tf_common.py PASSED                                  [ 66%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_model_from_pretrained PASSED                                                                        [ 69%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_model_main_input_name <- tests/test_modeling_tf_common.py PASSED                                    [ 72%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_model_outputs_equivalence <- tests/test_modeling_tf_common.py PASSED                                [ 75%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_numpy_arrays_inputs <- tests/test_modeling_tf_common.py PASSED                                      [ 77%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_onnx_compliancy <- tests/test_modeling_tf_common.py PASSED                                          [ 80%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_onnx_runtime_optimize <- tests/test_modeling_tf_common.py PASSED                                    [ 83%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_pt_tf_model_equivalence <- tests/test_modeling_tf_common.py SKIPPED (test is PT+TF test)            [ 86%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_resize_token_embeddings <- tests/test_modeling_tf_common.py PASSED                                  [ 88%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_save_load <- tests/test_modeling_tf_common.py PASSED                                                [ 91%]
tests/deberta/test_modeling_tf_deberta.py::TFDebertaModelTest::test_save_load_config <- tests/test_modeling_tf_common.py PASSED                                         [ 94%]
tests/deberta/test_modeling_tf_deberta.py::TFDeBERTaModelIntegrationTest::test_inference_masked_lm SKIPPED (Model not available yet)                                    [ 97%]
tests/deberta/test_modeling_tf_deberta.py::TFDeBERTaModelIntegrationTest::test_inference_no_head PASSED                                                                 [100%]

============================================================================== warnings summary ===============================================================================
../../../.virtualenvs/transformers/lib/python3.8/site-packages/flatbuffers/compat.py:19
  /Users/kamal.raj/.virtualenvs/transformers/lib/python3.8/site-packages/flatbuffers/compat.py:19: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
    import imp

-- Docs: https://docs.pytest.org/en/stable/warnings.html
================================================================== 34 passed, 2 skipped, 1 warning in 36.42s ==================================================================
```

Deberta-v2
```bash
============================================================================= test session starts =============================================================================
platform darwin -- Python 3.8.9, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 -- /Users/kamal.raj/.virtualenvs/transformers/bin/python
cachedir: .pytest_cache
hypothesis profile 'default' -> database=DirectoryBasedExampleDatabase('/Users/kamal.raj/Documents/GitHub/transformers/.hypothesis/examples')
rootdir: /Users/kamal.raj/Documents/GitHub/transformers, configfile: setup.cfg
plugins: xdist-2.4.0, timeout-2.0.1, dash-2.0.0, hypothesis-6.31.3, forked-1.3.0, typeguard-2.13.2
collected 51 items                                                                                                                                                            

tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_attention_outputs <- tests/test_modeling_common.py PASSED                                        [  1%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_config PASSED                                                                                    [  3%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_correct_missing_keys <- tests/test_modeling_common.py PASSED                                     [  5%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_deberta_model PASSED                                                                             [  7%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_determinism <- tests/test_modeling_common.py PASSED                                              [  9%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_equivalence_flax_to_pt <- tests/test_modeling_common.py SKIPPED (test is PT+FLAX test)           [ 11%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_equivalence_pt_to_flax <- tests/test_modeling_common.py SKIPPED (test is PT+FLAX test)           [ 13%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_feed_forward_chunking <- tests/test_modeling_common.py PASSED                                    [ 15%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_for_masked_lm PASSED                                                                             [ 17%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_for_question_answering PASSED                                                                    [ 19%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_for_sequence_classification PASSED                                                               [ 21%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_for_token_classification PASSED                                                                  [ 23%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_forward_signature <- tests/test_modeling_common.py PASSED                                        [ 25%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_gradient_checkpointing_backward_compatibility <- tests/test_modeling_common.py PASSED            [ 27%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_gradient_checkpointing_enable_disable <- tests/test_modeling_common.py PASSED                    [ 29%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_head_pruning <- tests/test_modeling_common.py PASSED                                             [ 31%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_head_pruning_integration <- tests/test_modeling_common.py PASSED                                 [ 33%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_head_pruning_save_load_from_config_init <- tests/test_modeling_common.py PASSED                  [ 35%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_head_pruning_save_load_from_pretrained <- tests/test_modeling_common.py PASSED                   [ 37%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_headmasking <- tests/test_modeling_common.py PASSED                                              [ 39%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_hidden_states_output <- tests/test_modeling_common.py PASSED                                     [ 41%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_initialization <- tests/test_modeling_common.py PASSED                                           [ 43%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_inputs_embeds <- tests/test_modeling_common.py PASSED                                            [ 45%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_load_with_mismatched_shapes <- tests/test_modeling_common.py PASSED                              [ 47%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_common_attributes <- tests/test_modeling_common.py PASSED                                  [ 49%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_from_pretrained PASSED                                                                     [ 50%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_main_input_name <- tests/test_modeling_common.py PASSED                                    [ 52%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_outputs_equivalence <- tests/test_modeling_common.py PASSED                                [ 54%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_parallel_beam_search <- tests/test_modeling_common.py SKIPPED (test requires multiple ...) [ 56%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_parallel_equal_results <- tests/test_modeling_common.py SKIPPED (test requires multipl...) [ 58%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_model_parallelization <- tests/test_modeling_common.py SKIPPED (test requires multiple GPUs)     [ 60%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_multi_gpu_data_parallel_forward <- tests/test_modeling_common.py SKIPPED (test requires mult...) [ 62%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_problem_types <- tests/test_modeling_common.py PASSED                                            [ 64%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_pt_tf_model_equivalence <- tests/test_modeling_common.py SKIPPED (test is PT+TF test)            [ 66%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_resize_embeddings_untied <- tests/test_modeling_common.py PASSED                                 [ 68%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_resize_position_vector_embeddings <- tests/test_modeling_common.py PASSED                        [ 70%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_resize_tokens_embeddings <- tests/test_modeling_common.py PASSED                                 [ 72%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_retain_grad_hidden_states_attentions <- tests/test_modeling_common.py PASSED                     [ 74%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_save_load <- tests/test_modeling_common.py PASSED                                                [ 76%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_save_load_fast_init_from_base <- tests/test_modeling_common.py PASSED                            [ 78%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_save_load_fast_init_to_base <- tests/test_modeling_common.py PASSED                              [ 80%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_save_load_keys_to_ignore_on_save <- tests/test_modeling_common.py PASSED                         [ 82%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_tie_model_weights <- tests/test_modeling_common.py PASSED                                        [ 84%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_torch_fx <- tests/test_modeling_common.py PASSED                                                 [ 86%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_torch_fx_output_loss <- tests/test_modeling_common.py PASSED                                     [ 88%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_torchscript_output_attentions <- tests/test_modeling_common.py PASSED                            [ 90%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_torchscript_output_hidden_state <- tests/test_modeling_common.py PASSED                          [ 92%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_training <- tests/test_modeling_common.py PASSED                                                 [ 94%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_training_gradient_checkpointing <- tests/test_modeling_common.py PASSED                          [ 96%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelIntegrationTest::test_inference_masked_lm SKIPPED (Model not available yet)                                 [ 98%]
tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelIntegrationTest::test_inference_no_head PASSED                                                              [100%]

============================================================================== warnings summary ===============================================================================
../../../.virtualenvs/transformers/lib/python3.8/site-packages/flatbuffers/compat.py:19
  /Users/kamal.raj/.virtualenvs/transformers/lib/python3.8/site-packages/flatbuffers/compat.py:19: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
    import imp

tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelTest::test_training_gradient_checkpointing
  /Users/kamal.raj/.virtualenvs/transformers/lib/python3.8/site-packages/torch/autocast_mode.py:141: UserWarning: User provided device_type of 'cuda', but CUDA is not available. Disabling
    warnings.warn('User provided device_type of \'cuda\', but CUDA is not available. Disabling')

tests/deberta_v2/test_modeling_deberta_v2.py::DebertaV2ModelIntegrationTest::test_inference_no_head
  /Users/kamal.raj/Documents/GitHub/transformers/src/transformers/models/deberta_v2/modeling_deberta_v2.py:539: DeprecationWarning: `np.int` is a deprecated alias for the builtin `int`. To silence this warning, use `int` by itself. Doing this will not modify any behavior and is safe. When replacing `np.int`, you may wish to use e.g. `np.int64` or `np.int32` to specify the precision. If you wish to review your current use, check the release note link for additional information.
  Deprecated in NumPy 1.20; for more details and guidance: https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
    bucket_pos = np.where(abs_pos <= mid, relative_pos, log_pos * sign).astype(np.int)

-- Docs: https://docs.pytest.org/en/stable/warnings.html
================================================================= 43 passed, 8 skipped, 3 warnings in 46.97s ==================================================================
```
@gante