When contructing a Reference using new Reference(baseRef, "relative-path"), a call to toString() returns just the relative part. It looks like the intended way to get the full URI is Reference.getTargetRef().toString().
Unfortunately HttpClientHelper:149 calls request.getResourceRef().toString() instead of what seems to be the more correct request.getResourceRef().getTargetRef().toString(). This results in an invalid URI in the HttpMethodCall.
