SQOOP-1718: Sqoop2: CommandLineClient doc error

(Veena Basavaraj via Jarek Jarcec Cecho)
SQOOP-1724: Sqoop2: Support old config types for backward compatibility in connector data upgrade

(Veena Basavaraj via Jarek Jarcec Cecho)
SQOOP-1725: Sqoop2: Connector upgrade in 1.99.4 fails with delete configs

(Veena Basavaraj via Abraham Elmahrek)
SQOOP-1721: Sqoop2: common jars missing for MR job

(Qian Xu via Jarek Jarcec Cecho)