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？

private final int[] VALUE;
    /**
     * store extra parameters which key not match in {@link DynamicParamTable}
     */
    private final Map<String, String> EXTRA_PARAMS;
    /**
     * store method related parameters
     * <p>
     * K - key
     * V -
     * K - method
     * V - value
     * <p>
     * e.g. method1.mock=true => ( mock, (method1, true) )
     */
    private final Map<String, Map<String, String>> METHOD_PARAMETERS;
    private transient long timestamp;
    /**
     * Whether to enable DynamicParamTable compression
     */
    protected boolean enableCompressed;
    private final static URLParam EMPTY_PARAM = new URLParam(new BitSet(0), Collections.emptyMap(), Collections.emptyMap(), Collections.emptyMap(), "");
    protected URLParam() {
        this.rawParam = null;
        this.KEY = null;
        this.VALUE = null;
        this.EXTRA_PARAMS = null;
        this.METHOD_PARAMETERS = null;
        this.enableCompressed = true;
    }