RabbitMQ - Handle demands after reconnect

[cescoffier]

At the moment, we cannot handle the demand correctly after a reconnection. The underlying RabbitMQ client (from Vert.x) requests Long.MAX_VALUE item, in this case, ignores the application demands.

As a result, the back pressure is ignored. It is related to #1906 and #2084.

@ozangunalp and I discussed the issue yesterday, and we would need a change in the rabbitMQ client to avoid that request but give us a hook to fetch the right amount of items. This issue aims to track this work.