Fix stress-tox-job.json action file.

Change I39b8a1d38f70ddda4867126b58bb7053b45654d6 changed how the
actions are called, but stress-tox-job.json was merged at the same
time. This commit updates the json definition to use the new paths
so that the tox job will work again.

Part of: blueprint stress-tests

Change-Id: Idadf08e0cc3f01650e72ca078a223781a0f1669a
diff --git a/tempest/stress/etc/stress-tox-job.json b/tempest/stress/etc/stress-tox-job.json
index 7c5626d..159794b 100644
--- a/tempest/stress/etc/stress-tox-job.json
+++ b/tempest/stress/etc/stress-tox-job.json
@@ -1,10 +1,10 @@
-[{"action": "tempest.stress.actions.create_destroy_server.create_destroy",
+[{"action": "tempest.stress.actions.create_destroy_server.CreateDestroyServerTest",
   "threads": 8,
   "use_admin": false,
   "use_isolated_tenants": false,
   "kwargs": {}
   },
-  {"action": "tempest.stress.actions.volume_create_delete.create_delete",
+  {"action": "tempest.stress.actions.volume_create_delete.CreateDeleteTest",
   "threads": 4,
   "use_admin": false,
   "use_isolated_tenants": false,