fix for running nosetests locally on devstack

Change-Id: Icf6fa3352826fc6c3f826dfbdbacf10d60637037

doc/source/vitrage-api.rst

@@ -135,7 +135,7 @@ Consists of a topology request definition which has the following properties:
 * depth - (int, optional) the depth of the topology graph. defaults to max depth
 * graph_type-(string, optional) can be either tree or graph. defaults to graph
 * query - (string, optional) a json query filter to filter the graph components. defaults to return all the graph
-* all_tenants -
+* all_tenants - shows the entities of all the tenants in the graph (in case the user has the permissions).
 
 query expression
 ================

vitrage_tempest_tests/tests/api/topology/test_topology.py

@@ -50,9 +50,10 @@ class TestTopology(BaseTopologyTest):
         This test validate correctness of topology graph:
          cli via api
         """
-        api_graph = self.vitrage_client.topology.get()
-        cli_graph = utils.run_vitrage_command('vitrage topology show',
-                                              self.conf)
+        api_graph = self.vitrage_client.topology.get(all_tenants=True)
+        cli_graph = utils.run_vitrage_command(
+            'vitrage topology show --all-tenants',
+            self.conf)
         self._compare_graphs(api_graph, cli_graph)
 
     @utils.tempest_logger

vitrage_tempest_tests/tests/utils.py

@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from functools import wraps
+
 import socket
 
 from oslo_config import cfg
@@ -115,6 +117,7 @@ def uni2str(text):
 def tempest_logger(func):
     func_name = func.func_name
 
+    @wraps(func)
     def func_name_print_func(*args, **kwargs):
         LOG.info('Test Start: ' + func_name)
         result = func(*args, **kwargs)