makefiles/ migration to repo:onf-make

https://github.com/opencord/onf-make

Makefile
VERSION
makefiles-orig/bootstrap.mk
makefiles-orig/include.mk
---------------------------
  o Rename makefiles/ to makefiles-orig/ as an interim step.
  o Transition to using repo:onf-make as a git sub-module which
    will allow removing duplicat and custom logic in each repository.

testing/certification.rst
-------------------------
  o Morph broken URL into a comment while configs are mia (certification.yaml).

Change-Id: I9396aec0301d263f18364944ad2ebdf633e52f57
diff --git a/VERSION b/VERSION
index 419a356..7ce9b67 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.12.6-dev1
+2.12.6-dev2