Updated openstack/openstack
Project: openstack/keystone  cddff74ef71b3c9284e3bdf24b6509c9d64acc79

fix wrong self link in the response of endpoint_groups API

OS-EP-FILTER prefix is missing in the url.

Change-Id: I0955c4cda1f8ced58517b317b47877e02eb1e5d8
Closes-Bug: #1404819