[CORD-3256] Generate TT/TP community test job.

jjb/voltha-test/voltha.yaml
jjb/voltha-test/voltha-nightly-jobs.yaml
----------------------------------------
  - First attempt at cloning a voltha pipeline job from DT to TT.
  - Add a few placeholders for future work to split yaml configs
    into a more modular setup.

Makefile
config.mk
makefiles/lint/groovy.mk
makefiles/lint/yaml.mk
makefiles/virtualenv.mk
------------------------
  - Copy in makefile libraries from repo::voltha-docs.
  - lint/yaml and lint/groovy.

Misc / Fixes
------------
  - Fixed colorization in tree output.
  - Comment out jjb import in requirements.txt, Makefile still configured to use an older version.
  - Move README.md outside jjb/ lf-env scripts blindly grep for error patterns beneath jjb/

Change-Id: I36e304f6ca9d54dc26fa5d36b17373cbb00f5afd
diff --git a/makefiles/lint/groovy.mk b/makefiles/lint/groovy.mk
new file mode 100644
index 0000000..6baf70c
--- /dev/null
+++ b/makefiles/lint/groovy.mk
@@ -0,0 +1,51 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Copyright 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
+#
+# 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  [---##
+##-------------------##
+
+groovy-check      := npm-groovy-lint
+
+groovy-check-args := $(null)
+# groovy-check-args += --loglevel info
+# groovy-check-args += --ignorepattern
+# groovy-check-args += --verbose
+
+##-------------------##
+##---]  TARGETS  [---##
+##-------------------##
+ifndef NO-LINT-GROOVY
+  lint : lint-groovy
+endif
+
+## -----------------------------------------------------------------------
+## Intent: Perform a lint check on command line script sources
+## -----------------------------------------------------------------------
+lint-groovy:
+	$(groovy-check) --version
+	@echo
+	$(HIDE)$(env-clean) find . -iname '*.groovy' -print0 \
+  | $(xargs-n1) $(groovy-check) $(groovy-check-args)
+
+## -----------------------------------------------------------------------
+## Intent: Display command help
+## -----------------------------------------------------------------------
+help-summary ::
+	@echo '  lint-groovy          Syntax check groovy sources'
+
+# [EOF]