Remove workaround for old ceph package
Remove workaround for old ceph package

This is a partial revert of 0c938590d2bc7e56a04b196ee8cf835786b9a6d4
and removes workaround for old ceph package. Now python3-ceph should
be installed instead of python2-ceph.

Change-Id: Ib139a7df91cadbf9ac77eb8d94791e5865414ba9

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration