JIRA: https://jira.spring.io/browse/INT-3370
* Add `BoonJsonObjectMapper`
* Provide some tests
* Remove deprecations
* Polishing test according removed deprecations
* Change `JsonObjectMapper#populateJavaTypes` to get deal with `payload`, not its `class`,
since we can't (and Jackson's `TypeFactory`, too) determine generic type from `Collection`.
Use `iterators` instead to retrieve the type from the first item.
Conflicts:
build.gradle
spring-integration-amqp/src/test/java/org/springframework/integration/amqp/support/DefaultAmqpHeaderMapperTests.java
INT-3370: Polishing according PR comments
* Apply Gary's polishing to the Docs
* Fix `RecipientListRouter` JavaDoc warn
* Fix typo in test name for `UdpUnicastEndToEndTests`
* Fix `RedisQueueOutboundChannelAdapterTests` do not use Jackson 1.x
Final Polish
f84e798272