svn merge -c 1443796 from trunk for YARN-377. Use the new StringUtils methods added by HADOOP-9252 and fix TestContainersMonitor.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1443799 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4471. Namenode WebUI file browsing does not work with wildcard addresses configured. Contributed by Andrew Wang.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1443809 13f79535-47bb-0310-9956-ffa450edef68