Open Stack

We have officially moved off of the instack-undercloud deployment
process in Rocky and have officially removed it's support from
python-tripleoclient in Stein.  In order to prevent confusion I have
proposed a patch to start the retirement of instack-undercloud[0].  We
will continue to support the stable branches for their life but we
don't want any further patches to instack-undercloud going forward.
Please let me know if there are any issues.

Thanks,
-Alex

[0] https://review.openstack.org/#/c/613621/