title: When accessing a Vaadin app behind a Zuul proxy get a Cookies disabled error
body: <p>Trying to access a Vaadin application built on top of Spring Cloud.  The application returns an error stating Cookies Disabled click here or hit ESC.</p>
  
  <p>Cookies are enabled within the browser.</p>
  
  <p>Configuration is Vaadin app registers with Eureka and Zuul proxies all request.</p>
  
  <pre><code>vaadin-app:
    path: /ui/vaadin/**
    stripPrefix: false
  </code></pre>
  
  <p>The Vaadin app does not use Spring Security or Vaadin Security</p>