Add --user-domain when adding heat role admin
Add --user-domain when adding heat role admin

The --user-domain parameter is required when adding the role for
Heat.  Without it, the command fails and the bootstrap
container exits early with the error message:

"No user with a name or ID of 'heat_domain_admin' exists."

Change-Id: I6f813edde3f437bca3ef521a43454146082bc5f5
Closes-bug: #1611768
Signed-off-by: Dave Walker (Daviey) <a88b7dcd1a9e3e17770bbaa6d7515b31a2d7e85d@daviey.com>

nihilifer/kolla,coolsvap/kolla,stackforge/kolla,rahulunair/kolla,intel-onp/kolla,GalenMa/kolla,mandre/kolla,dardelean/kolla-ansible,stackforge/kolla,dardelean/kolla-ansible,GalenMa/kolla,openstack/kolla,rahulunair/kolla,intel-onp/kolla,nihilifer/kolla,mandre/kolla,stackforge/kolla,mrangana/kolla,openstack/kolla,mandre/kolla,coolsvap/kolla,coolsvap/kolla,dardelean/kolla-ansible,mrangana/kolla