add dummy value for LengthBetweenCentersOfAxles when calculating reference factors

VectoCore/VectoCoreTest/Helper/TrailerTool/XDocumentCreator.cs

@@ -84,6 +84,14 @@ namespace TUGraz.VectoCore.Tests.Helper.TrailerTool
 			}
 
 
+			///For the calculation of the Reference Ratio, the LengthBetweenCentresOfAxles doesn't matter because only reference trailers are simulated
+			var lengthBetweenCentresOfAxles = xElements.Single(xElement =>
+				xElement.Name.LocalName == XMLNames.Trailer_LengthBetweenCentersOfAxles);
+			if (numberOfTrailerAxles == NumberOfTrailerAxles.One) {
+				lengthBetweenCentresOfAxles.Remove();
+			} else {
+				lengthBetweenCentresOfAxles.Value = "9.999";
+			}
 
 
 			var bodyWorkElement = xElements.Single(xElement => xElement.Name.LocalName == XMLNames.Trailer_BodyCode);