HADOOP-9407. Merge 1456704 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1456705 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9406. hadoop-client leaks dependency on JDK tools jar. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1456730 13f79535-47bb-0310-9956-ffa450edef68