HIVE-4954: PTFTranslator hardcodes ranking functions (Edward Capriolo via Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1508984 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into HIVE-4827