HIVE-8919 - Fix FileUtils.copy() method to call distcp only for HDFS files (not local files) (Sergio Pena via Brock)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/HIVE-8065@1640684 13f79535-47bb-0310-9956-ffa450edef68