Kafka Bug Fixes

[iancooper]

Fixes from V9

• Drops support for Co-operative Sticky rebalancing for now. (Defaults to Round Robin and gives an exception if you try to set co-operative). There is an issue around this you can track: [Bug] Error when number of partition changed using Cooperative rebalance protocol #3056 . It may take some thought because we need to know if we are rebalancing when we try to commit an offset.
• Removed a spurious call to StoreOffset. As we have our own offset store this was not being used.

[MaorDavidzon]

@iancooper It is a big limitation,
Is supporting comparative sticky with manual commit on the roadmap? This is a common use case and it’s already implemented in other clients.