Update following introduction of SPNL TaskData

Bwl input and output data are now consistent. Unfortunatly the common type is Any. Before the inpout was Any and the output was Map[String, Any]). Will change to a generic type in the future.
Simplified test (a little bit)
Merge pull request #10 from wajam/manu-taskdata

Update following introduction of SPNL TaskData