Convert much of the regression tests to use absolute imports. There's still work to be done though.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16976 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/admin_ordering/models.py

@@ -1,6 +1,7 @@
 # coding: utf-8
-from django.db import models
 from django.contrib import admin
+from django.db import models
+
 
 class Band(models.Model):
     name = models.CharField(max_length=100)