HIVE-9067: OrcFileMergeOperator may create merge file that does not match properties of input files (Prasanth Jayachandran reviewed by Sergey Shelukhin)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1645790 13f79535-47bb-0310-9956-ffa450edef68