Makefile library merge with onf-make and voltha-lib-go

makefiles/
----------
  o Import standalone makefile directories to checkin smaller parts of a mega patch.
  o Build out directory hierarchy by topic and feature.

makefiles/lint/yaml/
--------------------
  o Pull in logic evolved in repo:voltha-lib-go.
  o Refactoring: support special snowflake targets by repository.
  o ci-management and voltha-lib-go use distinct yamllint.conf files.
  o Separate until there is time to review and consolidate.
  o Added deps for on-demand local install of yamllint.
    - requirements.txt could be used but every build would incur overhead.

Makefile
--------
  o Use latest syntax from repo:onf-make.
  o No need to set path variables, makefiles/include.mk can infer them.
  o Added a help target to explicitly display targets and suggestions.
  o Logic is bundled in libraries and use of 'make help' is not well known.

Change-Id: Id8eba6f914a7bfe9a31637901bd8fb78a387e0c2
diff --git a/makefiles/jjb/include.mk b/makefiles/jjb/include.mk
index e61ad7c..7d213b4 100644
--- a/makefiles/jjb/include.mk
+++ b/makefiles/jjb/include.mk
@@ -23,12 +23,12 @@
 ##--------------------##
 ##---]  INCLUDES  [---##
 ##--------------------##
-include $(MAKEDIR)/jjb/help.mk
-include $(MAKEDIR)/jjb/required.mk
+include $(ONF_MAKEDIR)/jjb/help.mk
+include $(ONF_MAKEDIR)/jjb/required.mk
 
 ifdef USE-ONF-JJB-MK
   # Dynamic loading when targets are requested by name
-  include $(ONF_MAKE)/jjb/targets.mk
+  include $(ONF_MAKEDIR)/jjb/targets.mk
 endif
 
 # [EOF]
diff --git a/makefiles/jjb/targets.mk b/makefiles/jjb/targets.mk
index 17fc78f..730d229 100644
--- a/makefiles/jjb/targets.mk
+++ b/makefiles/jjb/targets.mk
@@ -36,13 +36,12 @@
 
 jjb-gen-log := $(jjb-gen-dir)/jjb-gen.log
 jjb-gen:
+	$(call banner-enter,Target $@)
 	@mkdir -p $(jjb-gen-dir)
-
-	@echo
-	@echo "** Generating pipelines (target: $@)"
 	@touch "$(jjb-gen-dir)/.sentinel"
-	( jenkins-jobs test $(PWD)/jjb -o $(jjb-gen-dir) 3>&1 2>&1 )\
-	   > "$(jjb-gen-log)"
+	( $(activate) \
+	   && jenkins-jobs test $(PWD)/jjb -o $(jjb-gen-dir) 3>&1 2>&1 \
+	) | tee "$(jjb-gen-log)"
 
   ifdef LOGS
 	-@less "$(jjb-gen-log)"
@@ -54,6 +53,8 @@
 	find "$(jjb-gen-dir)" -newer "$(jjb-gen-dir)/.sentinel" -ls
   endif
 
+	$(call banner-leave,Target $@)
+
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------
 sterile ::