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

648540858

2022-03-07 b2c953fc76de2a9686ee81d5311bd9b06e453912

 src/main/java/com/genersoft/iot/vmp/gb28181/session/SsrcConfig.java

@@ -81,7 +81,6 @@
            isUsed.remove(sn);
            notUsed.add(sn);
        }catch (NullPointerException e){
            System.out.printf("11111");
        }
    }