Comment 9 for bug 1281416

Options are:
- backport https://bugs.launchpad.net/grenade/+bug/1023131 to stable
(and remove devstack exercises from devstack)
- adjust devstack aggregates exercise on stable to work with novaclient master
- revert https://review.openstack.org/73526 - luckily it missed novaclient 2.16.0 release