Misc edits: makefiles/ and jjb templates.

Makefile
config.mk
makefiles/consts.mk
makefiles/lint/jjb.mk
---------------------
  o config.mk - initial setup to support library and local makefiles.
  o Move jjb lint target (~test) into jjb.mk, conditional logging verbosity.

makefiles/git-submodules.mk
---------------------------
  o Restore skeleton git submodule dir(s) after 'make sterile' is used.
  o Some external repo content placed under revision control.
  o Odd state: make clean induces bogus git status 'deleted:'

jjb/api-test.yaml
-----------------
  o Lint cleanup, fixed a complaint about replacment of non-expansive !include token.

jjb/defaults.yaml
-----------------
  o jjb + LinuxFoundation submodules have gone stale.
  o note download sources for a pending upgrade.

jenkins_jobs.errors.JenkinsJobsException:
  Failed to find suitable template named '{project-name}-ci-jobs'
-----------------------------------------------------------------
  o Finding 2020 changeset(s) also fail linting with this problem.
  o Might have an intermittent failure to debug in here.
  o Several jobs have run cleanly in the interim.

Change-Id: I20a0f3f0f731d6f312e5798af6049afd2e18c1c9
diff --git a/makefiles/include.mk b/makefiles/include.mk
index 1fe87ab..73696d9 100644
--- a/makefiles/include.mk
+++ b/makefiles/include.mk
@@ -20,11 +20,16 @@
 
 $(if $(DEBUG),$(warning ENTER))
 
-ONF_MAKE ?= $(MAKEDIR)# fix this -- two distinct makefile imports needed
+# OPT_ROOT    ?= /opt/trainlab/current
+# OPT_MAKEDIR := $(OPT_ROOT)/makefiles
+# MAKEDIR     ?= $(OPT_MAKEDIR)
+
+ONF_MAKE ?= $(MAKEDIR)# fix this -- two distinct makefiles/ directories are needed
 ONF_MAKE ?= $(error ONF_MAKE= is required)
 
 include $(ONF_MAKE)/consts.mk
 include $(ONF_MAKE)/help/include.mk
+
 include $(ONF_MAKE)/lint/include.mk
 include $(ONF_MAKE)/virtualenv.mk
 include $(ONF_MAKE)/git-submodules.mk