ReferencedRequestMessageIdInResponseValidator always attempts to cast to FlexRequest #72
Description
Describe the bug
ReferencedRequestMessageIdInResponseValidator is responsible for validating a response has a matching request available, e.g. FlexRequest for a FlexRequestResponse. For this is uses UftpMessageSupport#findReferencedMessage to retrieve the referenced message. The type is hardcoded as FlexRequest.class, resulting in unwanted behaviour when another class like FlexOffer is actually being retrieved.
Expected behavior
We should provide the correct class as referencedType when calling findReferencedMessage