YARN-2270. Made TestFSDownload#testDownloadPublicWithStatCache be skipped when there’s no ancestor permissions. Contributed by Akira Ajisaka.
svn merge --ignore-ancestry -c 1612460 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1612461 13f79535-47bb-0310-9956-ffa450edef68