HDFS-5279. Merging change r1528310 from branch-2 to branch-2.1-beta

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1528311 13f79535-47bb-0310-9956-ffa450edef68
YARN-1260. Added webapp.http.address to yarn-default.xml so that default install with https enabled doesn't have broken link on NM UI. Contributed by Omkar Vinit Joshi.
svn merge --ignore-ancestry -c 1528312 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1528314 13f79535-47bb-0310-9956-ffa450edef68