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/bug639/models.py

@@ -1,9 +1,10 @@
 import tempfile
 
-from django.db import models
 from django.core.files.storage import FileSystemStorage
+from django.db import models
 from django.forms import ModelForm
 
+
 temp_storage_dir = tempfile.mkdtemp()
 temp_storage = FileSystemStorage(temp_storage_dir)