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/Makefile b/Makefile
index e299ee2..3478b0f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,7 @@
 # Makefile for testing JJB jobs in a virtualenv
 .PHONY: all clean help test
 .DEFAULT_GOAL := all
+# .DEFAULT_GOAL := lint-jjb
 
 ##-------------------##
 ##---]  GLOBALS  [---##
@@ -26,12 +27,10 @@
 MAKEDIR      ?= $(TOP)/makefiles
 export SHELL := bash -e -o pipefail
 
-NO-LINT-MAKE  := true
-NO-LINT-SHELL := true
-
 ##--------------------##
 ##---]  INCLUDES  [---##
 ##--------------------##
+-include config.mk
 include $(MAKEDIR)/include.mk
 
 VENV_DIR      ?= venv-jjb
@@ -43,6 +42,12 @@
 
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------
+# lint : lint-jjb
+lint-tox:
+	tox -e py310
+
+## -----------------------------------------------------------------------
+## -----------------------------------------------------------------------
 .PHONY: test
 test: $(venv-activate-script) $(JOBCONFIG_DIR)
 	$(activate) \