Correctly call the base class tearDown();
otherwise running test_logging twice produce the errors we see on all buildbots
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index 1fac498..b937411 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -450,6 +450,7 @@
 
     def tearDown(self):
         self.mem_hdlr.close()
+        BaseTest.tearDown(self)
 
     def test_flush(self):
         # The memory handler flushes to its target handler based on specific