优化ssrc释放逻辑，优化级联点播速度，去除等待流格式的配置项

src/main/java/com/genersoft/iot/vmp/web/gb28181/ApiStreamController.java

@@ -150,7 +150,7 @@ public class ApiStreamController {
             JSONObject result = new JSONObject();
             result.put("error", "channel[ " + code + " ] " + eventResult.msg);
             resultDeferredResult.setResult(result);
-        });
+        }, null);
         return resultDeferredResult;
     }