Rename nova.create_image action

Change-Id: I584f9501af52f5e0f7c5f9e9fb238a68756c2832

CHANGELOG.rst

@@ -46,6 +46,8 @@ Changed
   api information has been moved into credentials object.
 * `Docker image <https://hub.docker.com/r/xrally/xrally-openstack>`_ now
   supports mysql and postgres as db backends.
+* Rename an action ``nova.create_image`` to ``nova.snapshot_server`` for better
+  understanding for what is actually done.
 
 Removed
 ~~~~~~~

rally_openstack/scenarios/nova/utils.py

@@ -483,7 +483,7 @@ class NovaScenario(scenario.OpenStackScenario):
                 check_interval=check_interval
             )
 
-    @atomic.action_timer("nova.create_image")
+    @atomic.action_timer("nova.snapshot_server")
     def _create_image(self, server):
         """Create an image from the given server
 

tests/unit/scenarios/nova/test_utils.py

@@ -246,7 +246,7 @@ class NovaScenarioTestCase(test.ScenarioTestCase):
         self.assertEqual(self.mock_wait_for_status.mock.return_value,
                          return_image)
         self._test_atomic_action_timer(nova_scenario.atomic_actions(),
-                                       "nova.create_image")
+                                       "nova.snapshot_server")
 
     def test__default_delete_server(self):
         nova_scenario = utils.NovaScenario(context=self.context)