Sometime during Kilo, the unique constraints on
metadef_namespaces (namespace)
metadef_objects(namespace_id, name)
metadef_properties(namespace_id, name)
metadef_tags(namespace_id, name)
metadef_resource_types(name)
were replaced with non-unique indices.
I believe this was done erroneously to make the migrate_repo/versions/scripts
match the db/sqlalchemy/models_metadef.py definitions. Unfortunately, the
schema scripts were correct with the unique constraints and what should have
changed was models_metadef.py.
This bug, puts one more migrate script in place which will rename any
duplicate records it finds to make them unique and then re-establishes
the unique constraints while dropping the non-unique indices. It also,
fixes models_metadef.py and adds in tests to attempt to create duplicates
which should result in an HTTPConflict.
Change-Id: Idf3569a27d64abea3ed6ec92fb77b36a4d6d5fd5
Closes-Bug: 1468946
5369e86e8d