Now ceph.enabled property in values.yaml file is not used anywhere
and almost all configuration about ceph is moved under conf property.
In addition, default values.yaml file has no ceph.glance_user property
and still the property is used in templetes.
It looks it's time to move remained ceph properties under conf tree
and remove ceph tree.
Closes-Bug: #1691011
Change-Id: I98f7a85eef517ab806432a7342aa3601e8183e0b
b58c5d2515