 Work around regression in openstacksdk 0.9.2
 Work around regression in openstacksdk 0.9.2

... that caused `openstack ip floating list -f json` to fail and return
"Connection failure that may be retried."

Signed-off-by: Zack Cerza <d7cdf09fc0f0426e98c9978ee42da5d61fa54986@redhat.com>

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