networking-bgpvpn/devstack at 119657dbb39450c21dd49a4a2663122441b6aa91 - networking-bgpvpn - OpenDev: Free Software Needs Free Tools

This change contains two changes to fix our CI:
- a reno branch naming issue
- a permission issue in devstack VM functional job
On the reno branch naming issue: something must have
changed somewhere in the way we should name branches
in reno files (old way: origin/stable/newton
new: stable/newton).
...
 ldr = loader.Loader(conf)
 File "/home/teom7365/prog/openstack/networking-bgpvpn/.tox/releasenotes/local/lib/python2.7/site-packages/reno/loader.py", line 60, in __init__
 self._load_data()
 File "/home/teom7365/prog/openstack/networking-bgpvpn/.tox/releasenotes/local/lib/python2.7/site-packages/reno/loader.py", line 80, in _load_data
 self._scanner_output = self._scanner.get_notes_by_version()
 File "/home/teom7365/prog/openstack/networking-bgpvpn/.tox/releasenotes/local/lib/python2.7/site-packages/reno/scanner.py", line 577, in get_notes_by_version
 versions_by_date = self._get_tags_on_branch(branch)
 File "/home/teom7365/prog/openstack/networking-bgpvpn/.tox/releasenotes/local/lib/python2.7/site-packages/reno/scanner.py", line 344, in _get_tags_on_branch
 for c in self._get_walker_for_branch(branch):
 File "/home/teom7365/prog/openstack/networking-bgpvpn/.tox/releasenotes/local/lib/python2.7/site-packages/reno/scanner.py", line 338, in _get_walker_for_branch
 branch_head = self._get_ref(branch)
 File "/home/teom7365/prog/openstack/networking-bgpvpn/.tox/releasenotes/local/lib/python2.7/site-packages/reno/scanner.py", line 334, in _get_ref
 raise ValueError('Unknown reference {!r}'.format(name))
ValueError: Unknown reference 'origin/stable/newton'
Change-Id: I22c09534bc713f4eb00d106285a07acdd6e99730