VOL-4836 - Cosmetic edits to trigger a jenkins job.

Makefile
makefiles/
----------
  o Added targets help, lint, sterile, todo, {go,java,python}-all.
  o replace "rm -rf" with make builtin $(RM) -r.
  o make clean: pass --no-run-if-empty to avoid a failure condition.

tox.ini
-------
  o Test target runs cleanly with python v3.10.6 so include as a valid interpreter version.

python/
python/test/
------------
  o Cosmetic edit, update copyright notice to trigger a jenkins job.

Change-Id: I3f10ada2774b0c5c742ee4aabcd60bbb56ab76dc
diff --git a/python/test/test_protos.py b/python/test/test_protos.py
index d13f5e9..cd4bad5 100755
--- a/python/test/test_protos.py
+++ b/python/test/test_protos.py
@@ -1,4 +1,4 @@
-# Copyright 2019-present Open Networking Foundation
+# Copyright 2019-2023 Open Networking Foundation (ONF) and the ONF Contributors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.