Allow keystone module to ignore service catalog
Allow keystone module to ignore service catalog

When bootstrapping Keystone it is sometimes useful to ignore the
service catalog and contact a specific Keystone instance.

Change-Id: I6ecfc422b0e8a7a5fadea08389c1268009ac7f2a

openstack/openstack-ansible-plugins,openstack/openstack-ansible-plugins,os-cloud/openstack-ansible-plugins,os-cloud/openstack-ansible-plugins