HIVE-8461: Make Vectorized Decimal query results match Non-Vectorized query results with respect to trailing zeroes... .0000 (Matt McCline reviewed by Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1636047 13f79535-47bb-0310-9956-ffa450edef68