kversion: metadata request is no longer on raft controller
See Kafka commit
@@ -400,7 +400,7 @@ var max080 = nextMax(nil, func(listenerKeys) listenerKeys {
k(zkBroker, rBroker), // 0 produce
k(zkBroker, rBroker, rController), // 1 fetch
k(zkBroker, rBroker), // 2 list offset
- k(zkBroker, rBroker, rController), // 3 metadata
+ k(zkBroker, rBroker), // 3 metadata
k(zkBroker), // 4 leader and isr
k(zkBroker), // 5 stop replica
k(zkBroker), // 6 update metadata, actually not supported for a bit
