旧com.alibaba.dubbo版本：2.5.9
新org.apache.dubbo版本：2.7.17

问题：旧的dubbo中设置过期时间放在字段default.timeout中，但是新的版本是在timeout中直接取值，会导致在旧的版本中设置的超时时间无效
![image](https://user-images.githubusercontent.com/41528403/197443590-266cb768-b499-4a72-9a26-a78937575ee0.png)
![image](https://user-images.githubusercontent.com/41528403/197443452-677a7f06-f0dc-484b-bc4a-4a9eb97d4b70.png)
这样的情况该如何兼容？

}
        @Override
        public boolean isEmpty() {
            return size() == 0;
        }
        @Override
        public boolean containsKey(Object key) {
            if (key instanceof String) {
                return urlParam.hasParameter((String) key);
            } else {
                return false;
            }
        }
        @Override
        public boolean containsValue(Object value) {
            return values().contains(value);
        }
        @Override
        public String get(Object key) {
            if (key instanceof String) {
                return urlParam.getParameter((String) key);
            } else {
                return null;
            }
        }
        @Override
        public String put(String key, String value) {
            String previous = urlParam.getParameter(key);
            urlParam = urlParam.addParameter(key, value);
            return previous;