HADOOP-8816. HTTP Error 413 full HEAD if using kerberos authentication. (moritzmoeller via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1433568 13f79535-47bb-0310-9956-ffa450edef68
merge YARN-135 from trunk. Client tokens should be per app-attempt, and should be unregistered on App-finish. Contributed by Vinod Kumar Vavilapalli


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1433571 13f79535-47bb-0310-9956-ffa450edef68