Skip test_encrypted_cinder_volumes_cryptsetup on Ceph

Ceph/RBD backend in cinder does not support plain encryption provider.

Related-Issue: PRODX-37481
Change-Id: Iaf5de3958ecbcd5696ab31708005440ccd3ab2de
(cherry picked from commit e08a6c414aaf4fa164efe68d26887b95611e0fc7)
1 file changed