Editing MockOutput to send actual generated boat/race/regatta xmls

- Was previously sending from a static source file

#story[778]

visualiser/src/main/java/seng302/Mock/StreamedCourseXMLReader.java

@@ -90,6 +90,7 @@ public class StreamedCourseXMLReader extends XMLReader {
 
     private void readParticipants() {
         Element nParticipants = (Element) doc.getElementsByTagName("Participants").item(0);
+        nParticipants.getChildNodes().getLength();
         for (int i = 0; i < nParticipants.getChildNodes().getLength(); i++) {
             int sourceID;
             Node yacht = nParticipants.getChildNodes().item(i);