The Fabric8 client used by the flink-kubernetes module uses okhttp3 by default. However, it can use other clients. Later versions of okhttp3 use Kotlin and we do not want to pull that into our productisation load.

Similar to the work done for the Flink Kubernetes Operator we should make it possible to specify the http client version used by the Fabric8 client in the flink-kubernetes module.

This can then be set to the vertx client in our downstream build.