* moved Spring retryable article to own package
* moved Spring retryable article to own package
* implement multiple listeners kafka app demo project
* fix PR comments
* BAEL-6057 - Implementing Retry In Kafka Consumer
(moved code example to new module)
* BAEL-6057 - Implementing Retry In Kafka Consumer
(fix on README.md)
Co-authored-by: Cesare <cesare.valenti@hotmail.com>