Merge pull request #29 from jdhok/develop

Column life validation for join chain
Fix for GRILL-541
Added missing drop table
Removed extra queries
Changed comment
Renamed TC to sort_merge_join_desc since it is testing sort merge should  be applied or not instead of map join in SMB
Merge pull request #30 from sumashivaprasad/develop

fix for SMB join on tables differing by number of columns but same sort order fails
Fix getStorageString for derived cubes