Ability to set discard topic to null #29
Description
We have a case where we are pulling out a subset of messages from a very busy topic based on a regex in the match spec. This results in a lot of messages going to the discard topic which are then ignored and eventually deleted. The volume is causing issues for the Kafka operations team so we want to create a way to mark the discard topic as null so that instead of discarding unmatched messages, they will just be ignored.