Add cube metastore

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/HIVE-4115@1456360 13f79535-47bb-0310-9956-ffa450edef68
Add cube query processing

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/HIVE-4115@1456361 13f79535-47bb-0310-9956-ffa450edef68