Opt-in retries during automatic recovery

[michaelklishin]

Java client recently introduced automatic connection recovery retries as on opt-in feature. They are useful in scenarios where recovery happens concurrently to other client activity in a way that can trip recovery up.

It would be nice to do the same in this client.

Related to #487.

[alrz]

Is this related to AlreadyClosedException when a recovery is in progress?

I think BasicPublish should internally wait for autorecovery to complete before attempting to send the msg that leads to the exception.

[lukebakken]

I think BasicPublish should internally wait for autorecovery to complete before attempting to send the msg that leads to the exception

@alrz great, please provide a PR with an implementation.

[alrz]

@lukebakken I see _flowControlBlock is already set on channel shutdown, shouldn't that be sufficient to block the call until recovery completes?