HBASE-10038 Fix potential Resource Leak in ZNodeCleaner

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1545875 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10032. [JDK8] ConcurrentSkipListMap class size changed

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1545876 13f79535-47bb-0310-9956-ffa450edef68