VOL-4840 - Tracing ticket for release documentation.

release_notes/voltha_2.11.rst
-----------------------------
  o Version string updates for a few released components.

howto/release/index.rst
howto/release/components/index.rst
----------------------------------

howto/release/preparation.rst
howto/release/components/onos_dependencies.rst
----------------------------------------------
  o Begin documenting the variant release process for onos components.
  o ONOS publishes builds through maven central -vs- github and tags.

Misc text edits within documents to improve clarity.

Change-Id: Ib1179a1a9ea7c9c6e02f40644ab29fbbd7a83443
diff --git a/howto/release/preparation.rst b/howto/release/preparation.rst
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index 0000000..0fcae23
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+Release Preparation
+===================
+
+As release date approaches and development slows visit the `jira versions dashboard <https://jira.opencord.org/projects/VOL?selectedItem=com.atlassian.jira.jira-projects-plugin%3Arelease-page&status=unreleased>`.
+- Create a new dashboard for the future release candidate.
+- Visit the current release candidate and move all unresolved tickets into the future desktop.
+- On release day click the [Release] button to close out the desktop.