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/tox.ini b/tox.ini
index da3f5cf..da1672b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,4 +15,4 @@
 
 [testenv:pep8]
 deps = pep8==1.3.3
-commands = python tools/hacking.py --ignore=T401,T402,E122,E125,E126 --repeat --show-source --exclude=.venv,.tox,dist,doc,openstack,*egg .
+commands = python tools/hacking.py --ignore=E122,E125,E126 --repeat --show-source --exclude=.venv,.tox,dist,doc,openstack,*egg .