Description of problem: Nova will be using versioned notifications only moving forward. We need to ensure novajoin is ready for the transition.
Greg, I fixed the doc text - the service that implemented the new format is novajoin (this bug), not nova, which started implementing the new format a couple of releases back. For reference - nova team is looking into dropping the unversioned notifications: http://lists.openstack.org/pipermail/openstack-dev/2018-August/133071.html
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2019:2811