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_widgets/widgetadmin.py

@@ -1,9 +1,12 @@
 """
 
 """
+from __future__ import absolute_import
+
 from django.contrib import admin
 
-import models
+from . import models
+
 
 class WidgetAdmin(admin.AdminSite):
     pass