@tillrohrmann Could you take another look? ## Brief change log
* reverted removal of Executor constructor argument, but changed type to ExecutorService * reverted chances to `RestServerEndpointConfiguration` * introduced a `Builder` for `ExecutorThreadFactory` * made thread-priority configurable in `ExecutorThreadFactory` * added ´WebMonitorEndpoint.createExecutorService` as a default factory [ Full content available at: https://github.com/apache/flink/pull/6786 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
