Fixed a bug that some columns become null for in-memory tables when lateral view explode is used.
Remove the extra println statements.
Merge pull request #336 from rxin/master

Fixed a bug that some columns become null for in-memory tables when lateral view explode is used.
Add ptest2_shark - framework for parallel testing
Fix issue with table reload.
Fixed exim_* tests (mkdir changes in the hadoop)
Fixed exim_* tests (added ptest://)
Fixed FileSystem detection
testCliDriver_skewjoin_union_remove_* are not supported yet
Updated tests_pass.txt, removed skewjoin_union_remove_ tests