Remove support for using an undercloud installed Heat, as it no longer
needs to be supported.
Change-Id: I39150aa6771a32318ad2cbcd50b6dddcd97b4663
Signed-off-by: James Slagle <jslagle@redhat.com>
(cherry picked from commit 60d17b2fa180ac4fc4c88af00d34f12c93a2ae92)