Rename models in ir_model_data

When renaming models, we also want to rename them in ir_model_data.

This prevents errors in rename_xmlids such as:

External ID conflict, document_page_procedure already refers to a
`wiki.wiki` record, you can't define a `document.page` record with this
ID.
Merge pull request #96 from savoirfairelinux/rename_ir_models

Rename models in ir_model_data