dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/loadbalance/
ConsistentHashLoadBalance.java
![image](https://user-images.githubusercontent.com/30815149/55045041-740f4980-5077-11e9-8b6c-7a2b18b0d58e.png)
我看其他地方都是用Constants进行替换，这里是不是可以使用Constants类里的属性进行替换
/**
     * To decide whether to make connection when the client is created
     */
    public static final String LAZY_CONNECT_KEY = "lazy";
    /**
     * The initial state for lazy connection
     */
    public static final String LAZY_CONNECT_INITIAL_STATE_KEY = "connect.lazy.initial.state";
    /**
     * The default value of lazy connection's initial state: true
     *
     * @see #LAZY_CONNECT_INITIAL_STATE_KEY
     */
    public static final boolean DEFAULT_LAZY_CONNECT_INITIAL_STATE = true;
    /**
     * To decide whether register center saves file synchronously, the default value is asynchronously
     */
    public static final String REGISTRY_FILESAVE_SYNC_KEY = "save.file";
    /**
     * Period of registry center's retry interval
     */
    public static final String REGISTRY_RETRY_PERIOD_KEY = "retry.period";
    /**
     * Most retry times
     */
    public static final String REGISTRY_RETRY_TIMES_KEY = "retry.times";
    /**
     * Default value for the period of retry interval in milliseconds: 5000
     */
    public static final int DEFAULT_REGISTRY_RETRY_PERIOD = 5 * 1000;