[VOL-5020] Release patch repo:voltha-helm-charts

howto/release/charts/index.rst
howto/release/charts/voltha-openolt-adapter.rst
-----------------------------------------------
  o Documenty howto update helm charts for repo:voltha-openolt-adapter

Change-Id: I37313bbc199aca4b258f53b1622efdf4f06c1087
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+RELEASE: voltha-helm-charts
+===========================
+
+- Repository `voltha-helm-charts <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts/+/refs/heads/master>`_.
+- Modify `VERSION file <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts/+/refs/heads/master/VERSION>`_.
+
+  - For release remove all version decorations: -dev, -SNAPSHOT
+
+- Release job will `publish to <https://gerrit.opencord.org/plugins/gitiles/cord-charts-repo/+/refs/heads/master>`_.
+
+- lint/syntax checking
+
+  - make test
+    - make lint-chart
+    - make lint-helm
+
+onos
+----
+
+- Update ONOS components `voltha-infra/values.yaml <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts/+/refs/heads/master/voltha-infra/values.yaml>`_
+
+