[VOL-5009] Update release notes, jira tickets.
release_notes/legend_onos_matrix.rst
release_notes/legend_voltha_matrix.rst
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o Added legend page for ONOS and VOLTHA release matrix.
o Document column usage.
release_notes/voltha_2.12.rst
-----------------------------
o Update more published version strings.
o VOLTHA Column labels to be less verbose.
o Remove column 'Component Ver' as unsued.
o Add convenience links for column headers Go(lang) and Pypi.
o Alphabetize VOLTHA table by component name.
Prior sort was in hierarchy/build order, more difficult to find items.
Change-Id: I66c976a113266121de173a1483f847c9ec732016
diff --git a/release_notes/legend_onos_matrix.rst b/release_notes/legend_onos_matrix.rst
new file mode 100644
index 0000000..160528a
--- /dev/null
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+.. _Release Notes Legend for ONOS:
+
+# Release Matrix Legend(s)
+
+.. list-table:: ONOS Components
+ :widths: 10, 60
+ :header-rows: 1
+
+ * - Name
+ - Description
+ * - Artifact Ver
+ - Version published to Maven Central.
+ * - API Version
+ - Versioned api-{package} artifact on Maven Central
+ * - APP Version
+ - Versioned app-{package} artifact on Maven Central
+ * - Pkg Version
+ - Versioned {package} artifact on Maven Central
+ * - Gerrit URL
+ - Code repository tag for published artifact.
+ * - Github URL
+ - Code repository tag for published artifact.
+ * - Released
+ - Release WIP tracking, ``N`` signifies repository release is pending.