YARN-506. Move to common utils FileUtil#setReadable/Writable/Executable and FileUtil#canRead/Write/Execute. Contributed by Ivan Mitic.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1477408 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4610. Use common utils FileUtil#setReadable/Writable/Executable and FileUtil#canRead/Write/Execute. Contrbitued by Ivan Mitic.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1477427 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-xxx-hadoop-auth-kerberos-realm-trunk-gd