Fixed #7718 -- Added a naive implementation of sorted() for Python 2.3 compatibility, and modified test cases to import the function when required.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7914 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/queries/models.py

@@ -8,6 +8,12 @@ import pickle
 from django.db import models
 from django.db.models.query import Q
 
+# Python 2.3 doesn't have sorted()
+try:
+    sorted
+except NameError:
+    from django.utils.itercompat import sorted
+                
 class Tag(models.Model):
     name = models.CharField(max_length=10)
     parent = models.ForeignKey('self', blank=True, null=True,