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/custom_columns_regress/models.py

@@ -8,6 +8,7 @@ table creation or queries.
 
 from django.db import models
 
+
 class Article(models.Model):
     Article_ID = models.AutoField(primary_key=True, db_column='Article ID')
     headline = models.CharField(max_length=100)