Merge pull request #3 from hughsaunders/master

Add variable for region, with default=DFW
Merge pull request #4 from hughsaunders/master

Add region to cleanup task
Don't use underscore in instance names, bad things happen
Remove unnecessary tag
Comment out when condition on ceph-disk-activate
Delay shorter period but retry more often
Merge pull request #5 from hughsaunders/master

Add exerstack test tasks
Merge pull request #6 from hughsaunders/master

Move ceph mon to OS AIO node, merge chef runs, run integration tests.
Use 'command' instead of 'shell' where possible
python-pbr is now correctly being pulled in by python-django-horizon
Force CPU model to work around a qemu on CentOS bug when we land on a Opteron_G5 hypervisor
Add some hackery to get builds going on CentOS