Combine the functionality of test_support.run_unittest()
and test_support.run_classtests() into run_unittest()
and use it wherever possible.

Also don't use "from test.test_support import ...", but
"from test import test_support" in a few spots.

From SF patch #662807.
diff --git a/Lib/test/test_unicodedata.py b/Lib/test/test_unicodedata.py
index a3a5fbc..61b4ffb 100644
--- a/Lib/test/test_unicodedata.py
+++ b/Lib/test/test_unicodedata.py
@@ -203,11 +203,11 @@
         self.assert_(count >= 10) # should have tested at least the ASCII digits
 
 def test_main():
-    suite = unittest.TestSuite()
-    suite.addTest(unittest.makeSuite(UnicodeMiscTest))
-    suite.addTest(unittest.makeSuite(UnicodeMethodsTest))
-    suite.addTest(unittest.makeSuite(UnicodeFunctionsTest))
-    test.test_support.run_suite(suite)
+    test.test_support.run_unittest(
+        UnicodeMiscTest,
+        UnicodeMethodsTest,
+        UnicodeFunctionsTest
+    )
 
 if __name__ == "__main__":
     test_main()