Fix resource_registry path in enable-internal-tls
Fix resource_registry path in enable-internal-tls

It had a wrong path and thus crashed when one tried to use it.

Change-Id: Ida4f899c76cce6e819d7e0effaf038f699763bee
Closes-Bug: #1643863

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