python-oslo-messaging-5.17.1-2.el7ost contains the "rabbit: make ack/requeue thread-safe" and is now ready for tests ;-)
Code Verified.
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-2017:1245