Initial Cinder tests

Adds Cinder RBAC base and create/delete volume tests

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

Change-Id: I57b405135e5dccf350661e6edb7582900885dc17
3 files changed