THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The controller will include the leader epoch of each partition when sending out an StopReplicaRequest. The broker will verify the epoch of each partitions and send an `STALE_CONTROLLER_EPOCH` error when the leader epoch received is older than the known one. `STALE_CONTROLLER_EPOCH` is used to remain consistent with the LeaderAndIsr API.
When a topic is deleted, the leader epoch is not bumped. In this case, we will send a sentinel (-1) which overrides any existing epoch.
Compatibility, Deprecation, and Migration Plan
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