[VOL-5054] - Triage build for voltha-openolt-adapter

cmd/*.go
internal/pkg/*.go
pkg/mocks/*.go
=================
  o Run gofmt -w -s on all non-(vendor/) golang sources (~make lint).
  o Release triage jobs have been failing on unrelated source problems.

config.mk
makefiles/docker/
makefiles/etc/
makefiles/targets/
makefiles/virtualenv.mk
=======================
  o https://github.com/opencord/onf-make.git
  o Copy in library makefiles, esp docker/include.mk

Makefile
========
  o Refactor and replace inline GO= and docker macros with docker/include.
  o Added manual flag LOCAL_FIX_PERMS=1 to grant docker image write access.
  o Target: mod-update
    - Split logic into targets mod-tidy and mod-vendor.
    - Display a banner when target runs for readability.
    - Target lint-mod now calls mod-update VS inlining make mod tidy & vendor
  o Target: test
    - Split logic into 3 distinct targets now that stdout/stderr handled.
    - Improve error handling, fail early VS accumulating status then exit
    - Display a banner when targets process for log readability.
    - Define macros for *.out and *.xml to avoid repeating logfile paths.

Change-Id: Ia2eb999f6176ce2eb46e41f55aee74c05b5a4cd2
diff --git a/makefiles/targets/sterile.mk b/makefiles/targets/sterile.mk
new file mode 100644
index 0000000..c661f53
--- /dev/null
+++ b/makefiles/targets/sterile.mk
@@ -0,0 +1,45 @@
+# -*- 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.
+#
+# SPDX-FileCopyrightText: 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
+# SPDX-License-Identifier: Apache-2.0
+# -----------------------------------------------------------------------
+
+$(if $(DEBUG),$(warning ENTER))
+
+## -----------------------------------------------------------------------
+## Intent: Revert sandbox into a pristine checkout stage
+## -----------------------------------------------------------------------
+##   Note: Sterile target behavior differs from clean around handling of
+##         persistent content.  For ex removal of a python virtualenv adds
+##         extra overhead to development iteration:
+##           make clean   - preserve a virtual env
+##           make sterile - force reinstallation
+## -----------------------------------------------------------------------
+.PHONY: sterile
+sterile :: clean
+
+## -----------------------------------------------------------------------
+## -----------------------------------------------------------------------
+help-verbose += help-sterile
+help-sterile ::
+	@echo
+	@echo '[MAKE: sterile]'
+	@echo '  sterile             make clean, also remove persistent content (~venv)'
+
+$(if $(DEBUG),$(warning LEAVE))
+
+# [EOF]