Updated openstack/openstack
Project: openstack-dev/devstack  4b3196f5a741f37473948ad2bb5ebf4033e4a533
null
create an UNDO_REQUIREMENTS variable

in the gate, we actually need to *not* roll back the requirements,
otherwise tempest can wedge the world because it runs under tox.

Make a variable that we can set to false in the gate to ensure that
we don't roll back the requirements changes.

Change-Id: I2b842ecc3f6e8b917dd721729640000bd7e7fb78