How to set client or clientFactory in the FhirConfiguration object?

[Paw B Sørensen]

The camel fhir component supports setting several query parameters. In the 
implementation of FhirConfiguration all of these parameters are annotated with 
@UriParam. Also in the implementation of FhirConfiguration I find the client 
and clientFactory variables but they are annotated with @Metadata. Can I make 
my own custom implementation of the client to 
intercept whenever a response code 4xx is received? And is it possible to set 
these Metadata values in my camel route?