Fixes https://github.com/spring-projects/spring-integration/issues/3686
* Add `src/idea` with respective editor config for IntelliJ IDEA.
Must be imported into an IDE
* Add `src/eclipse` with respective editor config for Eclipse/STS
* Reformat imports in source code according a new editor config
* Add Java DSL for Camel module and docs
* Introduce a `LambdaRouteBuilder` option into the `CamelMessageHandler`
to easily provide the Camel route just in-place
* * Fix language in docs
Co-authored-by: Gary Russell <grussell@vmware.com>
Co-authored-by: Gary Russell <grussell@vmware.com>
* Add Apache Camel support
* Implement `CamelMessageHandler` to perform send and send-n-reply
operations to the Apache Camel routes
* Fix `AbstractMessageProducingHandler` to handle async errors even if reply is
not expected
* * Narrow Camel dependency to `api`
