* Re-enable amulet tests which were disabled in error by the a
previous commit.
* Charmhelper sync to pickup cinder v2+ compat fixes in amulet
helper utils
* Add thin-provisioning-tools to packages as cinder now creates
thin lvm volumes by default and needs that pkg
* General v2 compat fixes in amulet tests
Change-Id: Ice227870c8a705d550107de280ebd65fdff31544