No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc

由于SpringCloud Feign在Hoxton.M2 版本之后不再使用Ribbon而是使用spring-cloud-loadbalancer，所以不引入spring-cloud-loadbalancer会报错

解决方式:

项目中添加loadbalancer依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>