[VOL-5064] - Build and deploy voltha-system-tests

makefiles/
----------
  o Copy in latest library makefiles from repo:onf-make

config.mk
makefiles/lint
--------------
  o Support more lint targets

makefiles/virtualenv.mk
-----------------------
  o Update to use library logic.
  o Install/maintain .venv/ VS vst_venv.
  o Proper dependency driven create when needed VS always install.
  o Also support replacing inlined venv logic with library makefile logs.

makefiles/commands/kail.mk
--------------------------
  o mkdir -p for interactive use when WORKSPACE= is set.

Makefile
--------
  o Inline comment delimiters and help targets to improve readabilty.
  o Call macro banner-enter/banner-leave to hilight target output.
  o Change targets clean and help into double-colon rules so they
    are included when library targets are processed.
  o Update include $(MAKEDIR) imports, library makefiles are able to infer paths
    and define MAKDIR=, ONF_MAKEDIR=.
  o Define helper macro run-robot-test= allowing copy & paste robot command
    line to be refactored and reduced.
  o Define local target 'venv-install' allowing installation of the virtualenv
    followed by patching so a newer interpreter can be used locally for testing.
  o Shell command separator: replace ';' with '&&' to improve error detection.
  o target=gendocs: Split run-on command line into independent steps, activate
    script only applies to the for loop invoking tests.

Change-Id: Idc8efd89f36b9f4954d9394a6524e07aa2ea5531
diff --git a/makefiles/lint/markdown/include.mk b/makefiles/lint/markdown/include.mk
new file mode 100644
index 0000000..26ebf43
--- /dev/null
+++ b/makefiles/lint/markdown/include.mk
@@ -0,0 +1,62 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Copyright 2017-2022 Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# -----------------------------------------------------------------------
+
+##-------------------##
+##---]  GLOBALS  [---##
+##-------------------##
+.PHONY: lint-mdl lint-mdl-all lint-mdl-modified
+
+have-rst-files := $(if $(strip $(RST_SOURCE)),true)
+RST_SOURCE     ?= $(error RST_SOURCE= is required)
+
+## -----------------------------------------------------------------------
+## -----------------------------------------------------------------------
+ifndef NO-LINT-MARKDOWN
+  lint-mdl-mode := $(if $(have-mdl-files),modified,all)
+  lint : lint-mdl-$(lint-mdl-mode)
+endif# NO-LINT-MDL
+
+# Consistent targets across lint makefiles
+lint-mdl-all      : lint-mdl
+lint-mdl-modified : lint-mdl
+
+# onf-excl-dirs
+LINT_STYLE ?= mdl_strict.rb
+
+mdl-excludes := $(foreach path,$(onf-exclude-dirs),! -path "./$(path)/*")
+
+lint-mdl:
+	$(call banner-enter,Target $@)
+	@echo "markdownlint(mdl) version: `mdl --version`"
+	@echo "style config:"
+	@echo "---"
+	@cat $(LINT_STYLE)
+	@echo "---"
+# 	mdl -s $(LINT_STYLE) `find -L $(SOURCEDIR) ! -path "./_$(venv-activate-script)/*" ! -path "./_build/*" ! -path "./repos/*" ! -path "*vendor*" -name "*.md"`
+	mdl -s $(LINT_STYLE) `find -L $(SOURCEDIR) $(mdl-excludes) -iname "*.md"`
+
+## -----------------------------------------------------------------------
+## Intent: Display command usage
+## -----------------------------------------------------------------------
+help::
+	@echo '  lint-mdl          Syntax check python using the mdl command'
+  ifdef VERBOSE
+	@echo '  lint-mdl-all       mdl checking: exhaustive'
+	@echo '  lint-mdl-modified  mdl checking: only modified'
+  endif
+
+# [EOF]