HIVE-4652 :  VectorHashKeyWrapperBatch.java should be in vector package (instead of exec) (Remus Rusanu via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/vectorization@1489506 13f79535-47bb-0310-9956-ffa450edef68