HIVE-5834: Avoid reading ORC footers for files which will not be split in OrcInputFormat::getSplits() (Gopal V via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1542424 13f79535-47bb-0310-9956-ffa450edef68