Pull cinder cephx keyring only when enable_cinder is true in nova
Pull cinder cephx keyring only when enable_cinder is true in nova

cinder_backup_ceph is true in default when enable_ceph is true.

Change-Id: Ic3cbd041a784610323cda4419acb6702f2aa35c1
Closes-Bug: #1699658

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible