Add necessary parameters for encrypted volumes support
Add necessary parameters for encrypted volumes support

If barbican is set, it will configure cinder and nova-compute with
the necessary parameters to enable encrypted volumes to be created if
requested.

Change-Id: Id13811cf8e090706c590ffff46c237ff8131efd9

openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates