[1.2.X] Fix broken tests due to changes in r15591 by updating the test...

[1.2.X] Fix broken tests due to changes in r15591 by updating the test store_rendered_templates signal handler.

Backport of r15600 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15601 bcc190cf-cafb-0310-a4f2-bffc1f526a37