in consumer, support dead letter policy

[wolfstudy]

Describe alternatives you've considered

Set dead letter policy for consumer

By default some message will redelivery so many times possible, even to the extent that it can be never stop.
By using dead letter mechanism messages will has the max redelivery count, when message exceeding the maximum number of redeliveries, message will send to the Dead Letter Topic and acknowledged automatic.

for specific functional descriptions, refer to: dead letter policy