HBASE-8764 Some MasterMonitorCallable should retry

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1507495 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8439 [replication] Remove ReplicationZookeeper class

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1507497 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9044 Merging regions throws NPE

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1507500 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9048 HCM throws NullPointerException under load

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HBASE-8439 [replication] Remove ReplicationZookeeper class; ADDENDDUM

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HBASE-9051 TestHFileOutputFormat.testExcludeAllFromMinorCompaction fails

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