HIVE-6825 : custom jars for Hive query should be uploaded to scratch dir per query; and/or versioned (Sergey Shelukhin, reviewed by Vikram Dixit K)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1585878 13f79535-47bb-0310-9956-ffa450edef68