In a multiregion installation of devstack, conflicts occur in the
creation of images, networks, or volume types, when the region is not
set.
This patch adjusts commands to include the region, and
also adjusts the region_name in the nova configuration section of
neutron.conf to include the region.
Change-Id: Ifedff6a124fa49d57cc7b2f35916d8d96f5e5f7a