Did we back port RHEL fixes for nologin labeling?
Yep, see https://github.com/lnykryn/systemd-rhel/commit/4dd0d6644c71149a0a1af89944b95325ac4d2f18
Sorry, second after posting I realized you are asking about the opposite. I think that we didn't do it yet.
*** Bug 1278287 has been marked as a duplicate of this bug. ***
This bug is resolved now. See bug #1287592 for the related part.