修改通道在线/离线描述，避免歧义

Lawrence

2021-01-11 6f2cd3ec08c9b11c20631bd3619e2102ba2c6b8c

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

@@ -17,13 +17,11 @@
   private ConcurrentHashMap<String, ClientTransaction> sessionMap = new ConcurrentHashMap<>();



   public String createPlaySsrc(){

      String ssrc = SsrcUtil.getPlaySsrc();

      return ssrc;

      return SsrcUtil.getPlaySsrc();

   }

   

   public String createPlayBackSsrc(){

      String ssrc = SsrcUtil.getPlayBackSsrc();

      return ssrc;

      return SsrcUtil.getPlayBackSsrc();

   }

   

   public void put(String ssrc,ClientTransaction transaction){