added static cinder_rbd_secret_uuid
added additional notes
removed unnecessary args for ceph_common
fsid explanation
fix the ceph common to match class definition
Merge branch 'rbd_secret_uuid' of https://github.com/CiscoSystems/grizzly-manifests into rbd_secret_uuid
Merge pull request #153 from CiscoSystems/rbd_secret_uuid

added static cinder_rbd_secret_uuid