Fix error when listing stacks

Previously the stack list command would error out if any stacks were
present. This was due to the action code attempting to index on a
stack object, rather than grabbing its attributes. This change switches
the action code to use the proper utility for a resource instead of
a dict.

Change-Id: Ia6b73d5c1ba7f7e3d7bc5493167da81062102b42
Blueprint: heat-support-python-openstackclient

heatclient/osc/v1/stack.py

@@ -226,5 +226,5 @@ def _list(client, args=None):
 
     return (
         columns,
-        (utils.get_dict_properties(s, columns) for s in data)
+        (utils.get_item_properties(s, columns) for s in data)
     )

heatclient/tests/unit/osc/v1/test_stack.py

@@ -116,7 +116,8 @@ class TestStackList(TestStack):
     def setUp(self):
         super(TestStackList, self).setUp()
         self.cmd = stack.ListStack(self.app, None)
-        self.stack_client.list = mock.MagicMock(return_value=[self.data])
+        self.stack_client.list = mock.MagicMock(
+            return_value=[stacks.Stack(None, self.data)])
         utils.get_dict_properties = mock.MagicMock(return_value='')
 
     def test_stack_list_defaults(self):