1. Fix the case of table names
2. Fix the sqlalchemy migration tests
NOTE: The sqlalchemy migrations test depends on oslo_db's migration
test which requires mysql user 'openstack_citest' with password
'openstack_citest' otherwise the test will be skipped.
Closes-Bug: #1654105
Change-Id: Ia672440a948fa4784f6dd1aa6d5fed0bc3915663