[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/jjb/voltha-test/voltha-nightly-jobs/README b/jjb/voltha-test/voltha-nightly-jobs/README
new file mode 100644
index 0000000..8b57f6f
--- /dev/null
+++ b/jjb/voltha-test/voltha-nightly-jobs/README
@@ -0,0 +1,7 @@
+This directory is used for refactoring and breakup of the kitchen sink
+JJB job yaml template that contains all versioned VOLTHA test stuies.
+
+git branches are not used, all jobs are visible.
+To support modular branch based testing naming conventions that include
+some form of voltha-X.YY will be used within configs and templates to
+support separation of jobs by release branch.
\ No newline at end of file