#4 - Update JPMML-Evaluator dependency to version 1.1.6.

The update seems to be quite seamlessly. The new [JPMML-Evaluator](https://github.com/jpmml/jpmml-evaluator) Version 1.1.6 contains a number of internal fixes and enhancements. We need to check whether the potentially updated dependencies are aligned with the ones from Spring XD.