Add to VOTLHA release process documentation.

overview/release_process.rst
----------------------------
  o Document repo:ci-management as a core release dependency.
  o Downstream repos cannot be tested until ci-management is branched.

howto/release/repositories/voltha-docs/
howto/release/repositories/voltha-lib-go/
--------------------------------------------------
  o Create skeletons for release documentation.

howto/release/repositories/ci-management/misc.rst
-------------------------------------------------
  o Document releasing ci-management.
  o bttb.sh script used for {tag-branch,branch-tag}ing.
  o Embed rst anchors so the doc can be :ref:erenced as a dependency.

Change-Id: I1920b160d99916f8147a89f2f74562f6c595c969
diff --git a/howto/release/repositories/ci-management/release.rst b/howto/release/repositories/ci-management/release.rst
new file mode 100644
index 0000000..f90440e
--- /dev/null
+++ b/howto/release/repositories/ci-management/release.rst
@@ -0,0 +1,82 @@
+.. _Release Repository ci-management:
+
+Repository: ci-management
+=========================
+
+- `repo:ci-management <https://gerrit.opencord.org/plugins/gitiles/ci-management>`_
+- First repsitory to release.
+- One of only three repositories to branch-then-tag.
+- Dependency for releasing all other repositories, test suites are
+  launched from release branch=votha-X.Y.
+
+Release: {Tag,Branch}ing script
+-------------------------------
+`repo:voltha-release <https://gerrit.opencord.org/plugins/gitiles/voltha-release>`_ :: `bttb.sh <https://gerrit.opencord.org/plugins/gitiles/voltha-release/+/refs/heads/master/bttb.sh>`_ (branch-tag/or/tag-branch)
+
+The bttb.sh script will perform several tasks to release a repository.
+
+- Clone a named sandbox.
+- Identify release activity by repository name: tag-branch or branch-tag.
+
+## Identify release activity by repository (TagBranch-or-BranchTag)
+
+.. code :: python
+
+  # Identify by repository name then tag-branch or branch-tag:
+  if repo in ['ci-management', 'voltha-helm-charts', 'voltha-system-tests']:
+      create_branch voltha-X.Y
+      create_tag attached to branch=voltha-X.Y
+  else:
+      create_tag 2.12.0 OR v2.12.0
+      create_branch voltha-2.12 attached to tag=2.12.0
+
+   % git push {tags,branches}
+
+## Create a release dev branch for edits
+
+.. code-block:: shell-session
+   :caption: Identify release activity by repository
+
+   % git clone -b dev-joey voltha-2.12  (or origin/voltha-2.12)
+
+   # Edit VERSION file: X.Y.{1+Z}
+   % echo 'X.Y.{1+Z}' > VERSION
+
+   # Edit .gitreview: defaultbranch=voltha-X.Y
+   % grep -v 'defaultbranch' .gitreview > .gitreview.tmp
+   % echo "defaultbranch=voltha-2.12" >> .gitreview.tmp
+   % mv -f .gitreview.tmp .gitreview
+
+## Command usage: bttb.sh
+
+.. code-block:: shell-session
+   :caption: Release tagging and branching
+
+   % git clone ssh://gerrit.opencord.org:29418/voltha-release
+   % cd voltha-release
+
+   % ./bttb.sh --help
+
+   declare -a args=()
+
+   args+=('--clean')                  # Remove existing checkouts
+   args+=('--edit')                   # Edit VERISON, commit message, etc
+
+   args+=('--[no-]gerrit')            # View repo branch & tags early
+   args+=('--sandbox' './sandbox')    # git clone target directory
+
+   args+=('--repo' 'ci-management')
+   args+=('--version' '2.12')         # votlha-2.12 release
+
+   args+=('--jira' 'VOL-5020') # Jira ticket: release the repository
+   args+=('--jira' 'VOL-5021') # addendum
+   args+=('--jira' 'VOL-5022')
+
+   # Generate branch={master,voltha-2.12} commit messages
+   args+=('--commit-message-dir' "${PWD}/sandbox/messages")
+
+   % ./bttb.sh "${args[@]}" 2>&1 | tee ci-management.log
+
+See Also
+--------
+https://docs.voltha.org/master/release_notes/release_process.html