Attached patch for CAMEL-4541: Bean Binding should support non-public classes when the target method is available through an interface

[Mathieu Lalonde]

Hi,

I attached a small patch with unit test for the following issue:
https://issues.apache.org/jira/browse/CAMEL-4541

Let me know if you have feedback or would like to discuss this further before 
accepting the change.

Thanks,
Mathieu

PS.  I have karma to update the wiki when the change gets accepted.