[1.2.X] A few test optimizations; using native unittest where no Django-specific TestCase features are required.

Backport of r13935 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13943 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/utils/html.py

@@ -1,8 +1,8 @@
-from django.test import TestCase
+import unittest
 
 from django.utils import html
 
-class TestUtilsHtml(TestCase):
+class TestUtilsHtml(unittest.TestCase):
 
     def check_output(self, function, value, output=None):
         """