Make calling the super class's setUp() method less fragile.

llvm-svn: 116490
diff --git a/lldb/test/stl/TestSTL.py b/lldb/test/stl/TestSTL.py
index 933a1f9..b489bae 100644
--- a/lldb/test/stl/TestSTL.py
+++ b/lldb/test/stl/TestSTL.py
@@ -23,7 +23,8 @@
         self.step_into_stl()
 
     def setUp(self):
-        super(STLTestCase, self).setUp()
+        # Call super's setUp().
+        TestBase.setUp(self)
         # Find the line number to break inside main().
         self.line = line_number('main.cpp', '// Set break point at this line.')