Open Stack

The work that started last cycle to make devstack only have a single
execution mode, that was the same between automated QA and local, is
nearing it's completion.

https://review.openstack.org/#/c/499186/ is the patch that will remove
screen from devstack (which was only left as a fall back for things like
grenade during Pike). Tests are currently passing on all the gating jobs
for it. And experimental looks mostly useful.

The intent is to merge this in about a week (right before PTG). So, if
you have a complicated devstack plugin you think might be affected by
this (and were previously making jobs pretend to be grenade to keep
screen running), now is the time to run tests against this patch and see
where things stand.

	-Sean

-- 
Sean Dague
http://dague.net