Add @Transactional on the runtime code in the lambda expression,
not on the functional bean. If it is set on the function bean, then
that will only be invoked at application initialization, thus losing
the transactional semantics on the actual runtme code.
Resolves https://github.com/spring-cloud/spring-cloud-stream-samples/issues/212
- Added transactional and some more required properties
- Setting read_commited in consumer
- Added license and author tag
- Added more fleshed out readme
- Added alternate failure and removed unique index
- Update spring boot starter parent to 2.1.0.BUILD-SNAPSHOT