SQOOP-1348: Sqoop2: Remove Data class

(Veena Basavaraj via Abraham Elmahrek)
SQOOP-1452: Sqoop2: Upgrade to Hadoop 2.5.1

(Veena Basavaraj via Jarek Jarcec Cecho)
SQOOP-1589: Sqoop2: Create common constants, error codes, and queries

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1703: Sqoop2: rename Type to Column Type + size to length + minor doc fixes

(Veena Basavaraj via Abraham Elmahrek)
SQOOP-1702: Fix typo for SQOOP-1526

(Richard via Jarek Jarcec Cecho)
SQOOP-1708: Rename Unsupported Column type to Unknown and add java doc

(Veena Basavaraj via Jarek Jarcec Cecho)