Updated openstack/openstack
Project: openstack-dev/devstack  2983291bd9071cc2109939346f41724581847ef0

Add argparse for RHEL6

python2.6 doesn't have argparse, required by outfilter.py.  This
package is a dependency on cloud-init, so this problem is often masked
in many testing environments.

Change-Id: Ia564f1b8a7b540faa7bbdbd1a1a290c591901682