Fixed #13348: Restored ability to load models from apps in eggs. Thanks Ramiro...

Fixed #13348: Restored ability to load models from apps in eggs. Thanks Ramiro and metzen for pointers on how to find out if a module loaded from an egg has a particular submodule.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@12982 bcc190cf-cafb-0310-a4f2-bffc1f526a37