Add support for printing the aggregate data stored in rabbit mq

[dennyabrain]

I would like to quickly see the status of rabbitmq from the feluda node.
This should be added to the debug script here - https://github.com/tattle-made/tattle-api/blob/master/src/api/debug.py

What i would like to do is run python debug.py stat -s queue to be able to get the total number or items enqueued in both the queues. any other useful aggregate status like number of failures, retries etc should also be included here.