Updated openstack/openstack
Project: openstack-dev/devstack  f583a04d739a189da6f3780f83e2ddc61bfe9e22
null
No need to loop over with pkill -f

I guess four times is better than one but if we need four times to kill
swift processes there is something pretty bad with it.

Change-Id: Id2ea2f4ca60feb9fddc7b3181063760d2044b421