Create a new testing_support module to move utility modules there

It will simplify importing utility modules from other projects. Otherwise I was getting name conflicts with 'test'.

Reenable W0403 that was disabled in the previous CL.

R=dpranke@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/8508015

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@109636 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/tests/gclient_scm_test.py b/tests/gclient_scm_test.py
index 4c57c3d..a44754f 100755
--- a/tests/gclient_scm_test.py
+++ b/tests/gclient_scm_test.py
@@ -21,8 +21,8 @@
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-from super_mox import mox, StdoutCheck, SuperMoxTestBase
-from super_mox import TestCaseUtils
+from testing_support.super_mox import mox, StdoutCheck, SuperMoxTestBase
+from testing_support.super_mox import TestCaseUtils
 
 import gclient_scm
 import subprocess2