[incubator/kafka] expose JMX_PORT

[m-sp]

FEATURE REQUEST

kafka exposes a lot of metrics via jmx. I would be great to have a values switch to enable exposing jmx on a port

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[AmundsenJunior]

This is available in values.yaml as option to expose the given port and assign to the KAFKA_JMX_PORT env var. Issue should be closed, then?

[m-sp]

Yes thanks, it seems this was done with #4072