Add support for rbd in glance

Add support for Ceph/rbd in glance.
Unit test added to spec.

Add package dependency "python-ceph" accordingly to a patch from
Michael Jeanson <mjeanson@gmail.com>.

Change-Id: I0908cde951994db6aba74d2ce3415126c429a76e
Merge "Add support for rbd in glance"
Remove Unnecessary mysql::server Dependency

Previously, the db::mysql class required mysql::server.  This is
unnecessary since the mysql::db define requires the mysql::config
class for db creattion.  Additionally, this prevents users from
using a different class such as galera::server to manage
the database.

Change-Id: I8ee9303eef67657dd2898d910897748a0af5415b
Merge git://github.com/puppetlabs/puppetlabs-glance