HIVE-4222 Timestamp type constants can not be deserialized in jdk 1.6 or less (Navis Ryu and Jason Dere via egc)

Submitted by: Jason Dere	
Reviewed by: Edward Capriolo	


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1506810 13f79535-47bb-0310-9956-ffa450edef68