Devstack-gate has been restructured since we added references to patches
to show what needs to be done to prepare for new stable branches. This
is a trivial update to point to a more recent review that is a better
example of what needs to be done.
Change-Id: Iacffaf3dce12b3aaea113d057d497e19970d0fc2
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>