gate-tempest-dsvm-layer4 fails with "EndpointNotFound: internalURL endpoint for compute service not found"

http://logs.openstack.org/18/307518/2/check/gate-tempest-dsvm-layer4/bbfacfd/logs/screen-sahara-api.txt.gz?level=TRACE

2016-04-22 22:40:41.881 682 ERROR sahara.utils.api [req-1af91083-c5ca-42e0-a0a8-e85b2a8f53e1 da4552da2dd348d885da3434f42332fa 49a5fbd8ae934335b86cc72dfb436395 - - -] Request aborted with status code 500 and message 'Error occurred during validation'
2016-04-22 22:40:41.884 682 ERROR sahara.utils.api [req-1af91083-c5ca-42e0-a0a8-e85b2a8f53e1 da4552da2dd348d885da3434f42332fa 49a5fbd8ae934335b86cc72dfb436395 - - -] Traceback (most recent call last):
  File "/opt/stack/new/sahara/sahara/service/validation.py", line 55, in handler
    validator(**kwargs)
  File "/opt/stack/new/sahara/sahara/service/validations/node_group_templates.py", line 30, in check_node_group_template_create
    data['hadoop_version'], data)
  File "/opt/stack/new/sahara/sahara/service/validations/base.py", line 133, in check_node_group_basic_fields
    check_flavor_exists(ng['flavor_id'])
  File "/opt/stack/new/sahara/sahara/service/validations/base.py", line 167, in check_flavor_exists
    flavor_list = nova.client().flavors.list()
  File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/flavors.py", line 132, in list
    return self._list("/flavors%s%s" % (detail, query_string), "flavors")
  File "/usr/local/lib/python2.7/dist-packages/novaclient/base.py", line 242, in _list
    resp, body = self.api.client.get(url)
  File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/adapter.py", line 173, in get
    return self.request(url, 'GET', **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 95, in request
    **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/adapter.py", line 330, in request
    resp = super(LegacyJsonAdapter, self).request(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/adapter.py", line 98, in request
    return self.session.request(url, method, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/positional/__init__.py", line 101, in inner
    return wrapped(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/session.py", line 341, in request
    base_url = self.get_endpoint(auth, **endpoint_filter)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/session.py", line 681, in get_endpoint
    return auth.get_endpoint(self, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/identity/base.py", line 213, in get_endpoint
    service_name=service_name)
  File "/usr/local/lib/python2.7/dist-packages/positional/__init__.py", line 101, in inner
    return wrapped(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/access/service_catalog.py", line 228, in url_for
    raise exceptions.EndpointNotFound(msg)

We don't index the sahara job logs so I'm not sure when this started, but it's a tempest change that's not related to sahara which failed in the gate.