When a SoapFault is thrown from a External Soap Service, then the SOAP fault is not propagated back to the initial caller.
https://github.com/jboss-fuse/switchyard/blob/2.x.redhat-6-2-x-patch/components/camel/camel-switchyard/src/main/java/org/switchyard/component/camel/switchyard/SwitchYardConsumer.java#L105