TAJO-338 - Add Query Optimization Part for Column-Partitioned Tables

  * Improved unit tests.
  * make standards more solid.
TAJO-424: Make serializer/deserializer configurable in CSVFile. (jinho)
Improved something.
TAJO-338 - Add Query Optimization Part for Column-Partitioned Tables

  * PartitionedTableScan
TAJO-338 - Add Query Optimization Part for Column-Partitioned Tables

  * Completed
  * before cluster test.
TAJO-338 - Add Query Optimization Part for Column-Partitioned Tables

  * Completed
  * before cluster test.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into TAJO-338
TAJO-426: HCatalogStore created partitions automatically. (jaehwa)
TAJO-338 - Add Query Optimization Part for Column-Partitioned Tables

  * Leaved comments
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into TAJO-338