Description of problem:

There is no need to send any XML body for signal process instance method since all the required params are send within form. Now it's not possible to send the signal request because I cannot fulfill the Consumes(xml) requirement.
Hint: It should be enough to remove the Consumes annotation. https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/kie-remote/kie-services-remote/src/main/java/org/kie/services/remote/rest/RuntimeResource.java#L119

I use following request with the form parameters.

ClientRequest restRequest = createRequest(address);
restRequest.accept("application/xml");

restRequest.formParameter("eventType", eventType);
restRequest.formParameter("event", event);

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