Fixed the test from [10447] to not depend on `os.listdir()` ordering. I always...

Fixed the test from [10447] to not depend on `os.listdir()` ordering. I always forget about that one; thanks, buildbot.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10449 bcc190cf-cafb-0310-a4f2-bffc1f526a37