Improvement: Retry rmq on connection failed

[amindadgar]

There are some cases which rabbitMQ (rmq) would become down on server and based on that the hivemind-bot worker will fail to connect and its instance will come down. We need to retry to connect on those cases. Another use case is when the hivemind-bot is trying to connect in first time. Having the rmq server down in first initialization the bot worker cannot again run. We need to retry on those cases too.