Cinder tests - Volume actions

Adds cinder RBAC tests for attaching, detaching, showing, and
copying volumes and changing volume to read-only status.

Implements bp: initial-tests-volume
Co-Authored-By: Rick Bartra <rb560u@att.com>

Change-Id: Iea586ca95e7274b79140a79a1d4f48a4894f403f
1 file changed