VOL-4925 - Build and release components.

voltha/Chart.yaml
voltha-stack/Chart.yaml
voltha-infra/Chart.yaml
voltha-infra/values.yaml
-----------------------
  o Fix a few lingering chart version problems (lint errs).

Makefile
makefiles/consts.mk
makefiles/lint/helm/include.mk
makefiles/lint/helm/detect-branch.mk
makefiles/lint/helm/helm.mk
makefiles/lint/helm/chart.mk
makefiles/lint/helm/tools.mk
------------------------------
  o modularize helm linting targets.
  o Split lint-chart and lint-helm into independent makefiles.

Change-Id: Id9b889f0b97248ab26d3abb1ea82f4f8234f1ed2
diff --git a/makefiles/consts.mk b/makefiles/consts.mk
index 8d8270d..2e5651f 100644
--- a/makefiles/consts.mk
+++ b/makefiles/consts.mk
@@ -26,6 +26,6 @@
 # SHELL       := bash -e -o pipefail
 
 env-clean   = /usr/bin/env --ignore-environment
-
+xargs-n1      := xargs -0 -t -n1 --no-run-if-empty
 
 # [EOF]