Description of problem:

The openstack-neutron package requires python-oslo-messaging, but this fact is not reflected in the package dependencies.  Installing openstack-neutron from OSP 7 and trying to run `neutron-db-manage` yields:

Traceback (most recent call last):
  File "/bin/neutron-db-manage", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/cli.py", line 238, in main
    CONF.command.func(config, CONF.command.name)
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/cli.py", line 72, in do_alembic_command
    getattr(alembic_command, cmd)(config, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/alembic/command.py", line 319, in current
    script.run_env()
  File "/usr/lib/python2.7/site-packages/alembic/script.py", line 382, in run_env
    util.load_python_file(self.dir, env.py)
  File "/usr/lib/python2.7/site-packages/alembic/util.py", line 242, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/lib/python2.7/site-packages/alembic/compat.py", line 79, in load_module_py
    mod = imp.load_source(module_id, path, fp)
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/alembic_migrations/env.py", line 23, in <module>
    from neutron.db.migration.models import head  # noqa
  File "/usr/lib/python2.7/site-packages/neutron/db/migration/models/head.py", line 24, in <module>
    from neutron.db import agents_db  # noqa
  File "/usr/lib/python2.7/site-packages/neutron/db/agents_db.py", line 20, in <module>
    import oslo_messaging
ImportError: No module named oslo_messaging

Version-Release number of selected component (if applicable):

openstack-neutron-2015.1.0-12.el7ost.noarch