Fixed some silly assumptions about pk's that broke the test suite under postgresql.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10348 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/model_formsets/tests.py

@@ -9,7 +9,7 @@ class DeletionTests(TestCase):
         data = {
             'form-TOTAL_FORMS': u'1',
             'form-INITIAL_FORMS': u'1',
-            'form-0-id': u'1',
+            'form-0-id': str(poet.pk),
             'form-0-name': u'test',
             'form-0-DELETE': u'on',
         }