rearrange Ceph storage options

In the settings tab and in the backend, represent storage settings as
five true/false toggles instead of two enum based radio selectors, so
that multiple or no storage backends can be configured where applicable.

In setup wizard, keep the radio selectors for Cinder and Glance
backends, set corresponding toggles based on the selection, and keep
object storage backend options unchecked by default.

For release that doesn't have ceph-osd role defined (RHOS), all Ceph
options are disabled in the wizard and absent from the settings tab.

Change-Id: Ic23778b8e400cd19a00384aa8fa5c9e84cc614f0
Merge "rearrange Ceph storage options"