Return service unavailable for non-supported iq requests (like vcard) instead...

Return service unavailable for non-supported iq requests (like vcard) instead of bad request.  (bad request implies actual poorly sent request)

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk/src/plugins/gateway@7143 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/wildfire/gateway/BaseTransport.java

@@ -439,7 +439,7 @@ public abstract class BaseTransport implements Component, RosterEventListener {
         else {
             Log.debug("Unable to handle iq request: " + xmlns);
             IQ error = IQ.createResultIQ(packet);
-            error.setError(Condition.bad_request);
+            error.setError(Condition.service_unavailable);
             reply.add(error);
         }