Ensures testtools 0.9.32

It includes a fix for a typo around the unittest2 skipTest
exeption import, see testtools revision 366, which is useful to
SKIP correctly on py26

Change-Id: Ice4dd9f79aaac8678d85dc393632cf5752d253f7
Fix create_security_group_rule to work with python 2.6

Change 59f00281ef1fa9448f5caf78a1c558625c83f65e introduced new code
which only works on python 2.7. This patch keeps the same function as
that change but makes it also work on python 2.6.

Fixes bug 1193066

Change-Id: I701259020f1ff15c0082328895ddc32cec9d3da1
Merge "Ensures testtools 0.9.32"
Merge "Fix create_security_group_rule to work with python 2.6"