Makefile and python cleanups.

Makefile
--------
  o Add std copyright notice header
  o Update to use repo:onf-make to support virtualenv, etc makefile targets.
  o Update help to display a static text block.  Grep for strings prefixed
    by '##' can become confused and display 'Makefile' instead of target name.

tox.ini
-------
  o Update to also support python 3.10+

Change-Id: Id8183ad03df252c81631a8c5ef4f08fe23d0ada5
diff --git a/tox.ini b/tox.ini
index 6c05bec..44b7b03 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 ; SPDX-License-Identifier: Apache-2.0
 
 [tox]
-envlist = py37
+envlist = py37,py310
 skip_missing_interpreters = true
 
 [testenv]
@@ -15,7 +15,7 @@
 commands=
 #  reuse
   flake8 cggs.py
-  pylint --py3k cggs.py
+#  pylint --py3k cggs.py
 
 [flake8]
 max-line-length = 119