Prep work for creating jenkins v2.10 and 2.11 job views.

jjb/pipeline/voltha/master/*
----------------------------
  o Update copyright notice to be current.

jjb/pipeline/voltha/voltha-2.10/bbsim-tests.groovy
--------------------------------------------------
  o Debugging: augment script to self-identify
  o Debugging: determine if a shell command is available.

jjb/verify/bbsim.yaml
---------------------
  o Add a version definition and bbsim test job for 2.10 & 2.11

vars/installVoltctl.groovy
--------------------------
  o Convert if-then-else block into a dictionary to simplify
    version detection logic.
  o Minor cleanups for the shellcheck tool
     o Quote environment vars
     o Fold long shell pipelines across multiple lines for readability.
  o [DEBUG] Added enter/leave printlns() to help identify a problem
    source from context in the log.  Null appeared in a kubectl setup
    for etcd.

Change-Id: I3fa824dffc1f37614c569faa1e1829a7466202b3
diff --git a/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy b/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy
index 56ddf59..29a9f62 100644
--- a/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy
+++ b/jjb/pipeline/voltha/master/voltha-scale-multi-stack.groovy
@@ -1,5 +1,4 @@
-// Copyright 2019-present Open Networking Foundation
-//
+// Copyright 2019-2022 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.
 // You may obtain a copy of the License at