Dead-letter subscription requires its own DLQ (DLQ2) to forward unprocessable messages

TC:

Just turn ot dead-lettering-required = true, then subscription listening to 'dead-letter-queue'. You will see an error, a kind of "Please, create a dead-letter-queue for this subscription". This subscription listens to DLQ, but needs to create a new DLQ to move some "dead" events to DLQ2.