openstack: there may be more than one IPv4 subnet
openstack: there may be more than one IPv4 subnet

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

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