Merge "Use unittest2 instead of unittest."

tests/utils.py

@@ -1,8 +1,8 @@
 import time
-import unittest
 
 import httplib2
 import mox
+import unittest2 as unittest
 
 from keystoneclient.v2_0 import client
 

tools/pip-requires

@@ -7,3 +7,4 @@ nose
 pep8
 prettytable
 simplejson
+unittest2