Update the copyright date in the newly added test_admin.py

django_openid_auth/tests/test_admin.py

 # django-openid-auth -  OpenID integration for django.contrib.auth
 #
-# Copyright (C) 2009-2010 Canonical Ltd.
+# Copyright (C) 2009-2012 Canonical Ltd.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions