I have a customer (AMEX) who just checked and this fix does not seem to be in OSP10. Also they request a BACKPORT to OSP8 please.
Newton still seems to be ucs_hostname and not ucs_address in spite of https://review.openstack.org/#/c/370773/2/os_cloud_config/nodes.py
This bugzilla has been removed from the release and needs to be reviewed and Triaged for another Target Release.
*** This bug has been marked as a duplicate of bug 1290338 ***