implements bug #1021767
To sync db migration, for now use temporary
script tools/dbsync. Modify it to point
to your db url (example 'sqlite:///ceilometer.db'
or 'mysql://user:mypass@localhost/ceilometer').
Also ensure the database_connection= in conf
files point to same db url.
Change-Id: I1c72b0a6b860738e94cf19666cb47db88ac9b251