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/tempest/services/compute/json/quotas_client.py b/tempest/services/compute/json/quotas_client.py
index 2cc417f..543b015 100644
--- a/tempest/services/compute/json/quotas_client.py
+++ b/tempest/services/compute/json/quotas_client.py
@@ -28,7 +28,7 @@
         self.service = self.config.compute.catalog_type
 
     def get_quota_set(self, tenant_id):
-        """List the quota set for a tenant"""
+        """List the quota set for a tenant."""
 
         url = 'os-quota-sets/%s' % str(tenant_id)
         resp, body = self.get(url)