Propagate exception to caller in dead letter error handler

[Firas Khasawneh]

Hi all,

Is there a way to propagate an exception to the caller in a DeadLetterChannel 
error handler? There is the handled option but not sure where to set it. It 
looks like it used to be set on the RedeliveryPolicy in Camel 2.0 but I don't 
see it in Camel 3.4.0.

Thanks,
Firas