HIVE-4804 parallel order by fails for small datasets (Navis via egc)

Submitted by:	Navis
Reviewed by:	Edward Capriolo


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1500071 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4089 : javax.jdo : jdo2-api dependency not in Maven Central (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1500186 13f79535-47bb-0310-9956-ffa450edef68