Fixed #15076 -- Quoted ForeignKey target class names in inspectdb when class is defined below.

Thanks saschwarz for the report, jeff@deserettechnology.com for the initial patch and Ramiro Morales for the review. 


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17942 bcc190cf-cafb-0310-a4f2-bffc1f526a37