Add dummy version of batch_write to cassandra impl

This is very basic realization of batch_write operation.

Change-Id: I642382b3d4bc91b94336ff5c19c175ef242b4f11
Implements: blueprint cassandra-batch-operations
Add batch_write_item API v1 method

Add basic realization of batch_write_item API method.

Change-Id: Ic21246c3fd06a1957dd89df86422702212e06c45
Implements: blueprint os-restful-api-batch-write
Adds tempest tests on ReST API query

Partially implements: bp tempest-rest-api-tests
Change-Id: Icd3427fc39cfae60beb6d516a25c216d91b659b7
Added MagnetoDB artifacts for publishing in Infra

Change-Id: I1628b23677713330ba665d124f98b228f36d9a0f
Implements: blueprint publish-magnetodb-artifacts
Adds tempest tests on ReST API create_table and describe_table

Partially implements: bp tempest-rest-api-tests
Change-Id: Ifbb4b10b198820e06675e1b053bd1289beb3a3ca
Merge "Added MagnetoDB artifacts for publishing in Infra"
Modified hooks for tempest

Add way to launch stable, not_ready and in_progress tests
in run_test.sh.

Implemented: blueprint modify-tempest-hooks
Change-Id: I6a7812d4b36c2e9c70d6d1b87fe014f72ce9d0ab
Merge "Add dummy version of batch_write to cassandra impl"
Merge "Add batch_write_item API v1 method"
Merge "Adds tempest tests on ReST API query"
Add batch_write to cassandra impl

This realization of batch_write operation based on Cassandra BATCH
instruction.

Change-Id: If74c1321e44e29650f9384ef4d46e1737c4fbe22
Implements: blueprint cassandra-batch-operations
Merge "Adds tempest tests on ReST API create_table and describe_table"
Fixed exit code of tempest tests

Fixed correct exit from stable tests in post_test_hook.sh and
run_tests.sh.

Closes-Bug: #1299660
Change-Id: I83620ae2ed0d63ce9cbc81db9423bc5e538125e0
Uses tempest.conf from upstream tempest

Change-Id: Iff98999e940661d0e18f9eb6a196e7cca6d298e9
Implements: blueprint use-upstream-tempest-conf
Used OpenJDK7 as default java instead of OracleJDK

Change-Id: I3c8b9940dd32e7ec5947f39b6ce0439dee2c4518
Implements: blueprint openjdk-for-devstack-gating