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

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1526009 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/trunk@1526026 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9639 SecureBulkLoad dispatches file load requests to all Regions

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1526033 13f79535-47bb-0310-9956-ffa450edef68