update openstack profile

The OpenStack profile is still stuck on Mitaka, and we are now well past the Ocata release. Wow, we are now past the Pike release, too.

I already had done the bulk of the work for Newton support in a quick pass, so hopefully this won't be that hard.

However, this time, I will probably migrate to a git-backed profile, unless that makes it prohibitively hard for people to sanely copy it. Still considering that. What initially concerned me is that to copy a fixed-point of the profile, they have to actually fork the profile repo, AFAIK.