svn merge -c 1453955 FIXES: HDFS-4560. Webhdfs cannot use tokens obtained by another user (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1453957 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1454019 FIXES: HADOOP-9374. Add tokens from -tokenCacheFile into UGI (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1454028 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-0.23' into branch-0.23-gd
Merge remote branch 'origin/branch-0.23-gd' into fb-xxx-hadoop-auth-kerberos-realm-branch-0.23-gd