Removed db recipes

The db recipes have been removed.  It is up to the operator to
setup the database, users, and grants before deploying openstack.
These have been moved to the `openstack-db` recipe in the
`openstack-ops-database` wrapper cookbook.

Change-Id: I19e71d22091b919f6dcffeb22a8e095d100f08fd
Merge "Removed db recipes"