Sqoop2: Validations: Provide Validation annotations
SQOOP-1441: Sqoop2: Validations: Enforce defined validations
SQOOP-1417: Sqoop2: From/To: Change ConnectorType name

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1447: Sqoop2: From/To: Change DirectionError messages

(Abraham Elmahrek via Jarek Jarcec Cecho)
Merge remote-tracking branch 'remotes/origin/SQOOP-1367' into SQOOP-1367