如果注册到注册中心失败，打印的日志内容含有敏感信息

[Happy-26]

在 com.alibaba.cloud.nacos.registry.NacosServiceRegistry 类中，如果注册失败会打印错误日志，此时会将nacos的用户名和密码明文打印出来。

@Override
public void register(Registration registration) {
      
      if (StringUtils.isEmpty(registration.getServiceId())) {
	      log.warn("No service to register for nacos client...");
	      return;
      }
      
      NamingService namingService = namingService();
      String serviceId = registration.getServiceId();
      String group = nacosDiscoveryProperties.getGroup();
      
      Instance instance = getNacosInstanceFromRegistration(registration);
      
      try {
	      namingService.registerInstance(serviceId, group, instance);
	      log.info("nacos registry, {} {} {}:{} register finished", group, serviceId,
			      instance.getIp(), instance.getPort());
      }
      catch (Exception e) {
	      if (nacosDiscoveryProperties.isFailFast()) {
                                    // 此时会将nacos的用户名和密码明文打印出来。
		      log.error("nacos registry, {} register failed...{},", serviceId,
				      registration.toString(), e);
		      rethrowRuntimeException(e);
	      }
	      else {
		      log.warn("Failfast is false. {} register failed...{},", serviceId,
				      registration.toString(), e);
	      }
      }
}

建议此处不打印敏感信息

[ruansheng8]

I will fix it.