Patch for Py3k with fallback for comparing unsortable sequences in
assertSameElements.

Removed the expected failure and added another test case to confirm that
this patch works for unsortable sequences that are the same (no fail)
and different (fail).

Issue #2578
diff --git a/Lib/test/test_unittest.py b/Lib/test/test_unittest.py
index 33204f8..aaa3dc5 100644
--- a/Lib/test/test_unittest.py
+++ b/Lib/test/test_unittest.py
@@ -2392,8 +2392,6 @@
             self.assertRaises(self.failureException, self.assertEqual, a, b,
                               msg='foo')
 
-    # The fact that dictionaries are unorderable breaks this test for them.
-    @unittest.expectedFailure
     def testEquality(self):
         self.assertListEqual([], [])
         self.assertTupleEqual((), ())
@@ -2459,6 +2457,8 @@
         self.assertSameElements([{'a': 1}, {'b': 2}], [{'b': 2}, {'a': 1}])
         self.assertRaises(self.failureException, self.assertSameElements,
                           [[1]], [[2]])
+        self.assertRaises(self.failureException, self.assertSameElements,
+                          [{'a': 1}, {'b': 2}], [{'b': 2}, {'a': 2}])
 
     def testAssertSetEqual(self):
         set1 = set()