Daemon workers do not automatically recreate lost connection

[sphuber]

Due to the limited heartbeat timeout that is set by the default configuration of the RabbitMQ server (see #1821), the connection of daemon workers are often closed by the server. Currently, the worker does not seem to be able to automatically reopen its connection

[muhrin]

Again as with #1821 this should be fixed by plumpy v0.11. This one is perhaps even more tricky to test as it requires externally forcing a connection drop and checking if the connection comes back. I think we should really push this back to kiwipy as it is responsible for making sure that the communicator reconnects itself. If this works, plumpy and aiida should also.