apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/eureka/ApolloEurekaClientConfig.java/ApolloEurekaClientConfig/refreshEurekaClient
class ApolloEurekaClientConfig:  private void refreshEurekaClient() {
    if (!super.isFetchRegistry()) {
        super.setFetchRegistry(true);
        super.setRegisterWithEureka(true);
        refreshScope.refresh(EUREKA_CLIENT_BEAN_NAME);
    }
  }