Six is Python 2 and 3 compatibility. It is no longer needed now that we're purely py3. Change-Id: I28a6f8539b3b3ce35221728ec631380a18c921b3
(contains the vpp driver for openstack/tap-as-a-service) Change-Id: Ibd28c936ba4f13e3822b495e43ad80781df81c1f