Fixed #8317 -- Corrected the inspectdb management command to properly set...

Fixed #8317 -- Corrected the inspectdb management command to properly set `primary_key=True` and `unique=True` on foreign keys. Thanks to bthomas for the report and patch, and to David Gouldin for the tests.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17451 bcc190cf-cafb-0310-a4f2-bffc1f526a37