*** Bug 1467596 has been marked as a duplicate of this bug. ***
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/RHBA-2017:2407
Just to add a note to this BZ in case someone is still hitting this even with the package from this errata. If the THT that is being used does not contain https://review.openstack.org/#/c/484418/, this error may still occur.
*** Bug 1481276 has been marked as a duplicate of this bug. ***