controller/ceilometer: use internalURL for os endpoint type
controller/ceilometer: use internalURL for os endpoint type

To let ceilometer access to keystone endpoints, use internalURL instead
of publicURL for security & performances reasons.

Ceilometer services (API, agents) will use internalURL endpoint to talk
to other services (keystone, neutron, etc).

Change-Id: I4cb843400f244cd34bbae4bc76371977780c7943

trozet/opnfv-tht,bcrochet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,dprince/tripleo-heat-templates,dprince/tripleo-heat-templates,bcrochet/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht,openstack/tripleo-heat-templates,trozet/tripleo-heat-templates