HBASE-10194 [Usability]: Instructions in CompactionTool no longer accurate because of namespaces

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1552231 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10196 Enhance HBCK to understand the case after online region merge(addendum)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1552243 13f79535-47bb-0310-9956-ffa450edef68