Managed connection recovery

In release 3.0.0, with upgrade to com.rabbitmq:amqp-client:4.0.0 there was introduced bug #39. akka-rabbitmq doesn't act properly in case of disconnects, because newer amqp-client enables by default automatic recovery of broken connections.
Two recovery activities don't play nicely together, yet. They need a bit of time to get used to each other.
As a quickfix, before creating of connection factory settings are changed to disable autorecovery.