spring eureka required a bean of type 'com.netflix.discovery.DiscoveryClient' that could not be found.
spring在集成第三方过程很容易出现类名相同，且基本作用相同的类。这样给初学者带来一定的困惑。
导致用错类而出现以下问题。
required a bean of type 'com.netflix.discovery.DiscoveryClient' that could not be found.
此问题就是我们错误的使用了netflix的DiscoveryClient,而非spring的。
解决方案：
换成spring的类，好啰嗦呀。
详细
https://stackoverflow.com/questions/42845084/cannot-find-discoveryclient-bean-error-in-spring-boot
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