Fix T401 and T402 errors

Fix all the one line docstring errors in T401 and T402, now
we no longer ignore any of our own rules in hacking.py

Fix run_tests.sh to pick up the 'stress' directory, which tox
does for pep8. Additional fixes to the stress tests for T4* tests

Change-Id: Ie569a924e8eb355afbbd9b244f77dec34061b5cb
diff --git a/stress/pending_action.py b/stress/pending_action.py
index 635d2cc..abfa74d 100644
--- a/stress/pending_action.py
+++ b/stress/pending_action.py
@@ -46,7 +46,7 @@
         return False
 
     def check_timeout(self):
-        """Check for timeouts of TestCase actions"""
+        """Check for timeouts of TestCase actions."""
         time_diff = time.time() - self._start_time
         if time_diff > self._timeout:
             self._logger.error('%s exceeded timeout of %d' %
@@ -76,7 +76,7 @@
         self._target = target_server
 
     def _check_for_status(self, state_string):
-        """Check to see if the machine has transitioned states"""
+        """Check to see if the machine has transitioned states."""
         t = time.time()  # for debugging
         target = self._target
         _resp, body = self._manager.servers_client.get_server(target['id'])