Remove FakeService.get_services
Remove FakeService.get_services

FakeService.get_services is useless in other test files, so remove it

Change-Id: If90b8742be97697f285750a05896b574c45f3504

openstack/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,dtroyer/python-openstackclient