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
public static final String GENERIC_SERIALIZATION_BEAN = "bean";
    public static final String DUBBO_IP_TO_REGISTRY = "DUBBO_IP_TO_REGISTRY";
    public static final String DUBBO_PORT_TO_REGISTRY = "DUBBO_PORT_TO_REGISTRY";
    public static final String DUBBO_IP_TO_BIND = "DUBBO_IP_TO_BIND";
    public static final String DUBBO_PORT_TO_BIND = "DUBBO_PORT_TO_BIND";
    public static final String BIND_IP_KEY = "bind.ip";
    public static final String BIND_PORT_KEY = "bind.port";
    public static final String REGISTER_IP_KEY = "register.ip";
    public static final String QOS_ENABLE = "qos.enable";
    public static final String QOS_PORT = "qos.port";
    public static final String ACCEPT_FOREIGN_IP = "qos.accept.foreign.ip";
    public static final String HESSIAN2_REQUEST_KEY = "hessian2.request";
    public static final boolean DEFAULT_HESSIAN2_REQUEST = false;
    public static final String HESSIAN_OVERLOAD_METHOD_KEY = "hessian.overload.method";
    public static final boolean DEFAULT_HESSIAN_OVERLOAD_METHOD = false;
    public static final String MULTICAST = "multicast";
    public static final String TAG_KEY = "dubbo.tag";
    public static final String FORCE_USE_TAG = "dubbo.force.tag";
    public static final String HOST_KEY = "host";
    public static final String PORT_KEY = "port";
    public static final String USERNAME_KEY = "username";
    public static final String PASSWORD_KEY = "password";
    public static final String ADDRESS_KEY = "address";
    public static final String RETRY_TIMES_KEY = "retry.times";
    public static final String RETRY_PERIOD_KEY = "retry.period";
    public static final String SYNC_REPORT_KEY = "sync.report";
    public static final String CYCLE_REPORT_KEY = "cycle.report";
    public static final String CONFIG_VERSION_KEY = "configVersion";
    public static final String COMPATIBLE_CONFIG_KEY = "compatible_config";
    /**