SQOOP-1645: Update label text and (optional) required info for the generic jdbc connector config properties

(Veena Basavaraj via Jarek Jarcec Cecho)
SQOOP-1383: Sqoop2: MSSQL Export not working

(Oleksiy Sayankin via Abraham Elmahrek)
SQOOP-1639: Sqoop2: CLOB data type wrong type

(Gwen Shapira via Abraham Elmahrek)
SQOOP-1526: Sqoop2: Kerberos support when starting service

(Richard Zhou via Abraham Elmahrek)