Updated openstack/openstack
Project: openstack/ceilometer  e12de4dba68ad4cc12705e76b6fdb5ccbb08caae

Remove unused db code due to api v1 drop

This changes remove the user and project tables that was only used by the
ceilometer v1 API.

Co-Authored-By: Ala Rezmerita <ala.rezmerita@cloudwatt.com>

Change-Id: I1d9dda48f30dc95e7c377a4eb446cdd895595754