Flink REST API response parsing throws exception on new fields

At the moment Flink is not ignoring unknown fields when parsing REST responses. An example for such a class is JobDetailsInfo but this applies to all others. It would be good to add this support to increase compatibility.

The real life use-case is when the Flink k8s operator wants to handle 2 jobs with 2 different Flink versions where the newer version has added a new field to any REST response. Such case the operator gets an exception when for example it tries to poll the job details with the additional field.