Fixes post-deployment init
Fixes post-deployment init

If you deploy and using the plugin, the UI doesn't recognize the
overcloud has been initialized.  The UI expects the horizon service
to be registered.  This patch adds the required information for a
service and endpoint to be registered for horizon.

Change-Id: I6f0b197f9062dd73b224045cbe9beca6f721cba8
Resolves: rhbz#1193922

openstack/python-tripleoclient,rdo-management/python-rdomanager-oscplugin