SQOOP-1757: Sqoop2: Document generic jdbc connector

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1861: Sqoop2: ResourceRequest clobbers uncaught server exceptions

(Abraham Elmahrek via Jarek Jarcec Cecho)
SQOOP-1893: add license header to TestSqoopIDFUtils

(Veena Basavaraj via Jarek Jarcec Cecho)
SQOOP-1872: IDF API should expose a method to add dependent jars

(Veena Basavaraj via Jarek Jarcec Cecho)