Set ca certificate file for keystone and nova
Set ca certificate file for keystone and nova

Use the default ca certificate file for Nova SSL and Keystone SSL calls.
Without these options the clients called from Nova cannot verify the
server and the calls will fail without insecure=True or verify=False for
their connections.

Change-Id: I6b05d5114103d16010a1a541c1916b7c9fd34e37

openstack/tripleo-image-elements,rdo-management/tripleo-image-elements,rdo-management/tripleo-image-elements,radez/tripleo-image-elements,radez/tripleo-image-elements,openstack/tripleo-image-elements