The `ReactorNettyTcpStompClient` is based on the `ReactorNettyTcpClient` which uses a `Schedulers.newParallel()` which has to be shut downed in the end * Migrate all the STOMP tests to JUnit 5
The `ReactorNettyTcpStompClient` is based on the `ReactorNettyTcpClient` which uses a `Schedulers.newParallel()` which has to be shut downed in the end * Migrate all the STOMP tests to JUnit 5