HBASE-9642. AM ZK Workers stuck doing 100% CPU on HashMap.put

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1526010 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9630 Add thread which detects JVM pauses like HADOOP's (Liang Xie)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1526028 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9639 SecureBulkLoad dispatches file load requests to all Regions

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HBASE-9649 HFilePrettyPrinter should not throw a NPE if FirstKey or LastKey is null (Jean-Marc Spaggiari)


git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1526112 13f79535-47bb-0310-9956-ffa450edef68