these methods basically are as follows:
AddressSettings addressSettings = addressSettingsRepository.getMatch(address);
addressSettings.setDeadLetterAddress(new SimpleString(deadLetterAddress));
This means that if the match is actually the root.'#', settings then all queues will be affected. We always add a new addresssettings but this means that any queue on that address will also use the same settings. I think we should either remove these methods all together or add them ass attributes on the queue and persist them.
