Quizzard throws error messages to console for broken web socket connections (2)

If a web socket connection is interrupted (someone stops the connection), an error is thrown in the console. This means that the console throws a lot of error messages for simply stopped web sockets. We should look into stopping these messages.

• Trigger the problematic errors. Investigate what is throwing the exceptions. Check how application.yml kills JOOQ messages
• Change application.yml to not throw the problematic error messages again.