Allow 401s when checking endpoints

Some endpoints (heat) return 401s if you try and access them
without authenticating. Given the ep has been able to verify
whether you are authenticated a 401 is ok for a rudementary
health check

zaza/openstack/charm_tests/keystone/setup.py

@@ -208,4 +208,7 @@ def wait_for_all_endpoints(interface='public'):
                                                  interface=interface):
             wait_for_url(
                 ep.url,
-                [requests.codes.ok, requests.codes.multiple_choices])
+                [
+                    requests.codes.ok,
+                    requests.codes.multiple_choices,
+                    requests.codes.unauthorized])