Db-sync the Ceilometer database

-The Ceilometer database wasn't db-synced till now.
 The code in reset-db is not executed, seems like the
 right way is to put the sync in the API post-configure.
 Other services do it like this.

Change-Id: Ia722669b18cfbf613f3d346aaa0a248e13de7cf5
Merge "Db-sync the Ceilometer database"