Cloned bug for an OSP8/Liberty backport.
A fix recently merged upstream stable/liberty: https://review.openstack.org/#/c/295324/
Package containing fix (openstack-nova-12.0.4-1.el7ost) is not yet available with the latest build dated 16-Jun-2016. The version available now is openstack-nova-12.0.3-11.el7ost.noarch.rpm.
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-2016:1313