Use keystone session with heatclient in integration tests

Change-Id: I4c66927e3dd3e1a91cfab94f26a24dbe8932bde8
Related-Bug: #1695144

heat_integrationtests/common/clients.py

@@ -15,7 +15,6 @@ import os
 from cinderclient import client as cinder_client
 from heat.common.i18n import _
 from heatclient import client as heat_client
-from keystoneauth1 import exceptions as kc_exceptions
 from keystoneauth1.identity.generic import password
 from keystoneauth1 import session
 from neutronclient.v2_0 import client as neutron_client
@@ -104,20 +103,17 @@ class ClientManager(object):
     def _get_orchestration_client(self):
         endpoint = os.environ.get('HEAT_URL')
         if os.environ.get('OS_NO_CLIENT_AUTH') == 'True':
-            token = None
-        else:
-            token = self.identity_client.auth_token
-        try:
-            if endpoint is None:
-                endpoint = self.identity_client.get_endpoint_url(
-                    'orchestration', self.conf.region)
-        except kc_exceptions.EndpointNotFound:
-            return None
+            session = None
         else:
+            session = self.identity_client.session
+
         return heat_client.Client(
             self.HEATCLIENT_VERSION,
             endpoint,
-                token=token,
+            session=session,
+            endpoint_type='publicURL',
+            service_type='orchestration',
+            region_name=self.conf.region,
             username=self._username(),
             password=self._password())