Fixing oauth2client appengine test to account for new devappserver.

Reviewed in https://codereview.appspot.com/8358046/
diff --git a/tox.ini b/tox.ini
index b0feaa6..e2e99ba 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,4 +10,9 @@
        webtest
        nose
 setenv = PYTHONPATH=../google_appengine
+
+[testenv:py26]
+commands = nosetests --ignore-files=test_oauth2client_appengine\.py
+
+[testenv:py27]
 commands = nosetests