Explicitly point undercloud instead of localhost
Explicitly point undercloud instead of localhost

This is a follow up of https://review.opendev.org/810389 and replaces
usage of localhost by explicit undercloud to delegate configuration
actions.

Change-Id: I9c649fecb6e742d9e1a4154f2b6d43fb333e83cb

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