SQOOP-1731: Sqoop2: Generic JDBC upgrade from 1.99.3 to 1.99.4

(Abraham Elmahre via Jarek Jarcec Cecho)
SQOOP-1728: Sqoop2: Force HDFS connector as a configurable fixes

(Veena Basavaraj via Abraham Elmahrek)
SQOOP-1736: Sqoop2: Driver missing during upgrade

(Veena Basavaraj via Abraham Elmahrek)