Tested against openstack-nova-2015.1.2-18.el7ost The issue is suppoesed 0043-volume-Fix-the-removal-of-multipath-backed-iSCSI-LUN.patch No extra multipaths were deleted by nova during the test runs.
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://rhn.redhat.com/errata/RHBA-2016-0261.html