WebUI: uncomment webdriver installation
Fix reactor package changes
XD-2430 Adding a Sqoop tasklet and Sqoop batch job
XD-2484 Update spring-data-hadoop version to 2.1.0.M3
XD-2483 Add codec option to hdfs-dataset sink
XD-2409 Changing correlation-strategy-expression

- partial reversal of earlier change to avoid errors when payload is a String