Update urllib/httplib/cStringIO to use six.moves

partial blueprint heat-python34-support

Change-Id: I00a7064560a95a33dcb1e621961765822d4e94d4
diff --git a/common/test.py b/common/test.py
index a7aa039..ed1e254 100644
--- a/common/test.py
+++ b/common/test.py
@@ -15,13 +15,13 @@
 import re
 import subprocess
 import time
-import urllib
 
 import fixtures
 from heatclient import exc as heat_exceptions
 from oslo_log import log as logging
 from oslo_utils import timeutils
 import six
+from six.moves import urllib
 import testscenarios
 import testtools
 
@@ -111,7 +111,7 @@
     def check_connectivity(self, check_ip):
         def try_connect(ip):
             try:
-                urllib.urlopen('http://%s/' % ip)
+                urllib.request.urlopen('http://%s/' % ip)
                 return True
             except IOError:
                 return False