For lldbutil.py, Change a bunch of function names to all lower case formats to be consistent.
And modify the test cases accordingly.

llvm-svn: 130174
diff --git a/lldb/test/python_api/lldbutil/TestPrintStackTraces.py b/lldb/test/python_api/lldbutil/TestPrintStackTraces.py
index 4bd4bda..22b8d263 100644
--- a/lldb/test/python_api/lldbutil/TestPrintStackTraces.py
+++ b/lldb/test/python_api/lldbutil/TestPrintStackTraces.py
@@ -47,7 +47,7 @@
                       lldbutil.StateTypeString(self.process.GetState()))
 
         if self.TraceOn():
-            lldbutil.PrintStackTraces(self.process)
+            lldbutil.print_stacktraces(self.process)
 
 
 if __name__ == '__main__':