Minor Description
Unlike most services, all registered exception recognizers are consulted whenever an exception is thrown. It therefore isn't possible to override/ignore a exception recognizer that (as this ticket proposes) has been annotated with @DomainService.
To cater for the (probably rather remote) possibility that these default exception recognizers might need to be disabled, introduce a config property to switch 'em off:
isis.services.ExceptionRecognizerCompositeForJdoObjectStore.disable