quota_usages table still show instances "in use" after dbaas.api.configuration int tests run

[Edmond Kotowski]

After running ./redstack int-tests --group="dbaas.api.configurations" the quota_usages table still shows the config instance "in use" which eventually causes quota exceeded errors when the value is 5 when running integration tests.

If the configuration tests fail and does not make it to the test test_delete_configuration_instance then the config instance will never be cleaned up.

Nova list will show the _config instance:

| TEST_2014-10-14 17:05:17.452594_config | ACTIVE | Running |

Fix would be to add a test tear down that will clean up the _config instance even if an error or exception gets raised in the test class.

[Edmond Kotowski (ekotowski)]

API logs from 2 test runs.