reponse formatting filter expects application/x-vlkb+xml instead of ../vlkb+xml

data-discovery/src/main/java/vlkb/webapi/FormatResponseFilter.java

@@ -115,7 +115,7 @@ public class FormatResponseFilter implements Filter
          final String respFormat = settings.serviceUrls.responseFormat();
          LOGGER.info("responseFormat: " + respFormat);
 
-         if(respFormat.equals("application/vlkb+xml")) // FIXME hsould be application/x-vlkb+xml -> x- is for eXperimental a.k.a. not registered
+         if(respFormat.equals("application/x-vlkb+xml"))
          {
             response.setContentType("application/xml");
             boolean showDuration = true;