HBASE-9687 Addendum shuts down the MiniMapReduceCluster



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Minor edit to release notes section

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1529332 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9612 Ability to batch edits destined to different regions

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