Updated openstack/openstack
Project: openstack/keystone  73968f733d073f03a6451644997b7fca6e92d041
null
Remove netifaces requirement

netifaces is not required to run the tests, so remove it from
the requirements.

Related-Bug: #1266513
Change-Id: Ifb3b262f47d629670b06c670353dbe798af4dc03