Child CFs' ConfirmsAndReturns are now enforced to follow the same configuration as the RoutingCF in spring-amqp

[rwanderc]

This issue comes from the changes in spring-amqp that enforces all child connection factories to follow the same configuration as the routing connection factory for checkConfirmsAndReturns() (here, issue).

The result is that configuration between child CF and the general RoutingCF cannot be different.