Addition of setUpClass and setUpModule shared fixtures to unittest.

Lib/unittest/result.py

@@ -16,6 +16,8 @@ class TestResult(object):
     contain tuples of (testcase, exceptioninfo), where exceptioninfo is the
     formatted traceback of the error that occurred.
     """
+    _previousTestClass = None
+    _moduleSetUpFailed = False
     def __init__(self, stream=None, descriptions=None, verbosity=None):
         self.failures = []
         self.errors = []