ignore appid

Author: markjrzhang

src/main/java/com/qcloud/cos/internal/CIServiceRequest.java

@@ -30,6 +30,7 @@ public class CIServiceRequest extends CosServiceRequest {
     private String bucketName;
     @XStreamAlias("RequestId")
     private String requestId;
+    @XStreamOmitField
     private String appId;
 
     public String getAppId() {