title: Dynamically update Eureka instance metadata
body: <p>When Spring Cloud Eureka instance starts I can define some instance metadata statically (in <code>eureka.instance.metadataMap.*</code> in my <code>application.yml</code>) or dynamically (using <code>EurekaInstanceConfigBean</code> for example). But once instance is registered, this metadata no longer updates in Eureka after I update the config bean.
  Is there a way to define some metadata that will dynamically update in Eureka? So Eureka will work kind of like a key-value storage for each instance.</p>