openstack: move net() to OpenStack
openstack: move net() to OpenStack

It is not only needed when provisionning the teuthology instance.

Signed-off-by: Loic Dachary <b6eae37fc74638590e3f9030895d42446505d41b@dachary.org>

dmick/teuthology,SUSE/teuthology,ceph/teuthology,ceph/teuthology,dmick/teuthology,SUSE/teuthology,dmick/teuthology,SUSE/teuthology,ktdreyer/teuthology,ktdreyer/teuthology