[1.3.X] Ensured that some staticfiles tests get properly cleaned up on teardown. Thanks to Claude Paroz for the patch.

Backport of r17747 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@17748 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/staticfiles_tests/tests.py

@@ -276,6 +276,7 @@ class TestCollectionFilesOverride(BuildStaticTestCase):
             os.unlink(self.testfile_path)
         # set back original modification time
         os.utime(self.orig_path, (self.orig_atime, self.orig_mtime))
+        super(TestCollectionFilesOverride, self).tearDown()
 
     def test_override(self):
         self.assertFileContains('file2.txt', 'duplicate of file2.txt')