[Experimental] Increase flexibility of posible output classses for outputAs after a listen one

[fjtirado]

Support both

 FuncWorkflowBuilder.workflow("listenToOneReviewCol")
            .tasks(
                listen("waitReview", toOne("org.acme.test.review"))
                    .outputAs((Collection node) -> node.iterator().next()))

And

FuncWorkflowBuilder.workflow("listenToOneReviewNode")
           .tasks(
                   listen("waitReview", toOne("org.acme.test.review"))
                       .outputAs((ArrayNode node) -> node.get(0))