feat: support for copying Kafka headers to MQ message properties (#53)
This pull request introduces a new feature to the MQ Sink Connector.
If enabled, all headers on messages consumed from Kafka will be added to
messages put to MQ as string properties.
The feature is named to be consistent with the equivalent feature in
the MQ Source Connector (`mq.kafka.headers.copy.to.jms.properties` where
the Source Connector currently has
`mq.jms.properties.copy.to.kafka.headers`)
The new feature is disabled by default to maintain compatibility with
current behaviour.
Closes: #52
Signed-off-by: Dale Lane <[email protected]>
