[VOL-5010] - Clone unit tests to run on a v2.12 branch

makefiles/consts.mk
makefiles/virtualenv.mk
-----------------------
  o Copy in latest library makefiles from repo:onf-make

global-jjb
packer/common-packer
--------------------
  o Upgrade LinuxFoundation submodules to the latest version.
  o global-jjb           : from=0.53.3 to=0.86.7
  o packaer/common-packer: from=0.1.0~22 to=0.12.1

.gitignore
makefiles/include.mk
makefiles/git/
makefiles/jjb/
--------------
  o Added convenience make targets to view submodule versions.
  o JJB target:jjb-gen added to prototype local pipeline edits.
  o Logic is conditional, library will only load when targets are requested.

jjb/voltha-test/voltha-certification/
jjb/voltha-test/voltha-certification/README
jjb/voltha-test/voltha-certification/master.yaml
------------------------------------------------
  o Create pseudo-branches within voltha testing so we can
  o 'branch' (simple directory copy) at release time VS
  o having to find and clone individual test suites from last release.

Change-Id: I3e0096d3326e76b3faa896d73183f9d28e946d06
diff --git a/makefiles/git/submodules.mk b/makefiles/git/submodules.mk
new file mode 100644
index 0000000..42c2fc2
--- /dev/null
+++ b/makefiles/git/submodules.mk
@@ -0,0 +1,57 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Copyright 2022-2023 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.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-FileCopyrightText: 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# SPDX-License-Identifier: Apache-2.0
+# -----------------------------------------------------------------------
+
+$(if $(DEBUG),$(warning ENTER))
+
+show-submodules:
+
+	$(HIDE)cat .gitmodules
+
+	@echo
+	$(HIDE) git submodule
+
+$(if $(DEBUG),$(warning LEAVE))
+
+# https://github.com/lfit/releng-global-jjb/tags
+# git checkout v0.86.7
+# [crucible:global-jjb] git checkout v0.86.7
+# Previous HEAD position was 5dc3432 Update regexp in lf-infra-ship-logs macro
+# HEAD is now at c5bd1d3 Fix: Pin urllib3~=1.26.15 in pypi dist jobs
+
+# 5dc3432cae2f13d9e5151a00a76a78ce73d92d70 global-jjb (v0.53.3)
+# 0d88f8b7a24b53b1c3e189e30ab94373c51eea91 lf-ansible (0d88f8b)
+# 4a5b0cd9032938194c4813fe36663ddee4f9e60e packer/common-packer (v0.1.0~22)
+
+# https://stackoverflow.com/questions/30301510/git-submodule-specify-version
+# cd global-jjb
+# git checkout v0.86.7
+# cd -
+# git commit . -m "use submodule v0.86.7"
+
+# https://github.com/lfit/releng-lf-ansible.git
+# tag==master, no release
+
+# https://github.com/lfit/releng-common-packer.git
+# cd packer/common-packer
+# git checkout v0.12.1
+# cd -
+# git commit . -m "use submodule v0.12.1""
+
+# [EOF]