HIVE-6766 : HCatLoader always returns Char datatype with maxlength(255)  when table format is ORC (Eugene Koifman, reviewed by Sushanth Sowmyan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1583786 13f79535-47bb-0310-9956-ffa450edef68