Convert all modeltests to use absolute imports, rather than relative ones.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16975 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/get_object_or_404/models.py

@@ -12,6 +12,7 @@ performing a ``filter()`` lookup and raising a ``Http404`` exception if a
 
 from django.db import models
 
+
 class Author(models.Model):
     name = models.CharField(max_length=50)
 

tests/modeltests/get_object_or_404/tests.py

@@ -1,8 +1,10 @@
+from __future__ import absolute_import
+
 from django.http import Http404
 from django.shortcuts import get_object_or_404, get_list_or_404
 from django.test import TestCase
 
-from models import Author, Article
+from .models import Author, Article
 
 
 class GetObjectOr404Tests(TestCase):