Remove request channels when closing
Remove request channels when closing

nats-io/go-nats,ZebinKang/go-nats,nats-io/nats,wallyqs/go-nats,ZebinKang/go-nats,nats-io/nats,apcera/nats,apcera/nats,wallyqs/go-nats,nats-io/go-nats