2.1.7

Change Log:

b80fbd4 Fix varargs warn for CompositeProducerListener
4fe846d GH-686: Handle tombstones in Json Ser/Deser
62e9325 GH-690: Propagate AfterRollbackProcessor to child
c4bf579 Typo fix for addTopics and doWithAdmin @since
c731e61 Add licence and notice to all artifacts
9d167b7 GH-699: Fix Batch Listener with Kotlin
4522342 GH-693: Add BytesJsonMessageConverter
ca65727 GH-691: Add CompositeProducerListener
221ead5 ProducerListener Improvements
99ccc2c GH-683: Fix Transactions with ErrorHandler
9307dcd GH-676: Allow to add topics into KafkaEmbedded