Remove the two different auth profiles

Ceph can function just fine generating the keys before the pools have
been created so we can apply the proper permissions to the auth string
ahead of time. This allows us to not require additional steps to add a
cache tier on the fly in the future.

Change-Id: I8214c567fb7c337f95d908c5699d1da922bfa1a6
Closes-Bug: #1518475