SQOOP-1236. Sqoop2: Classpath generated by Submission engine should contain only unique elements.

(Jarcec via Hari)
SQOOP-777: Sqoop2: Implement intermediate data format representation policy

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1379: Sqoop2: From/To: Disable tests

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1376: Sqoop2: From/To: Refactor connector interface

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1424: Sqoop2: Simplify SqoopCommand in shell package
SQOOP-1428: Sqoop2: From/To: Rebase against Sqoop2 branch for SQOOP-777