Description of problem:
Overcloud deployment prints following output
'Skipping "horizon" postconfig because it wasn't found in the endpoint map output'

Version-Release number of selected component (if applicable):
RHOSP 9.0

How reproducible:
Always

Steps to Reproduce:
1. openstack overcloud deploy


Actual results:
Stack overcloud CREATE_COMPLETE
/home/stack/.ssh/known_hosts updated.
Original contents retained as /home/stack/.ssh/known_hosts.old
Skipping "horizon" postconfig because it wasn't found in the endpoint map output
PKI initialization in init-keystone is deprecated and will be removed.
Warning: Permanently added '192.0.2.13' (ECDSA) to the list of known hosts.
The following cert files already exist, use --rebuild to remove the existing files before regenerating:
/etc/keystone/ssl/certs/ca.pem already exists
/etc/keystone/ssl/private/signing_key.pem already exists
/etc/keystone/ssl/certs/signing_cert.pem already exists
Connection to 192.0.2.13 closed.
Overcloud Endpoint: http://192.0.2.13:5000/v2.0
Overcloud Deployed


Expected results:
Stack overcloud CREATE_COMPLETE
/home/stack/.ssh/known_hosts updated.
Original contents retained as /home/stack/.ssh/known_hosts.old
PKI initialization in init-keystone is deprecated and will be removed.
Warning: Permanently added '192.0.2.13' (ECDSA) to the list of known hosts.
The following cert files already exist, use --rebuild to remove the existing files before regenerating:
/etc/keystone/ssl/certs/ca.pem already exists
/etc/keystone/ssl/private/signing_key.pem already exists
/etc/keystone/ssl/certs/signing_cert.pem already exists
Connection to 192.0.2.13 closed.
Overcloud Endpoint: http://192.0.2.13:5000/v2.0
Overcloud Deployed


Additional info:
Upstream Bug: https://bugs.launchpad.net/tripleo/+bug/1614115
Upstream Fix: https://review.openstack.org/#/c/357039