mqtt协议包，兼容读写返回值

src/main/java/org/jetlinks/protocol/official/JetLinksMqttDeviceMessageCodec.java

@@ -234,7 +234,13 @@ public class JetLinksMqttDeviceMessageCodec implements DeviceMessageCodec {
             Set<String> keySet = jsonObject.keySet();
             Map<String,Object> propertiesMap = new HashMap<>();
             for (String key : keySet) {
-                propertiesMap.put(key, ((JSONObject) jsonObject.get(key)).get("value"));
+                Object value = ((JSONObject) jsonObject.get(key)).get("value");
+                if (value != null && value.toString().equals("success")) {
+                    propertiesMap.put(key, 0);
+                } else {
+                    propertiesMap.put(key, value);
+                }
+
             }
             map.put("properties", propertiesMap);
             map.put("success",true);