added .trim to remove the unwanted bytes at the end of xml

#pair[hba56, fw13, jjg64]
#story[782]

network/src/main/java/seng302/Networking/MessageDecoders/XMLMessageDecoder.java

@@ -83,7 +83,7 @@ public class XMLMessageDecoder {
      * @return xml string as inputsource
      */
     public InputSource getXmlMessageInputSource() {
-        InputSource is = new InputSource(new StringReader(xmlMessage));
+        InputSource is = new InputSource(new StringReader(xmlMessage.trim()));
         return is;
     }