title: Not able to set timeout for ribbon and hyxtrix
body: <p>I'm trying to set in application.yml the properties to set the timeout for ribbon and hystrix and I'm not able to do that. I'm always getting the same issues:
  <strong>"Unknown property hystrix.command"</strong> and 
  <strong>"Unknown property ribbon.ConnectTimeout"</strong></p>
  
  <pre><code>hystrix:
    command:
      default:
        execution:
          isolation:
            thread:
              timeoutInMilliseconds: 11000
  ribbon:
    ConnectTimeout: 10000
    ReadTimeout: 10000
  </code></pre>
  
  <p>Using <strong>Finchley.SR1</strong> BTW.</p>
  
  <p>Always getting the same error:</p>
  
  <pre><code>2018-08-21 19:18:31.695  WARN 13534 --- [io-8765-exec-10] o.s.c.n.z.f.r.s.AbstractRibbonCommand    : The Hystrix timeout of 3000ms for the command flight-service is set lower than the combination of the Ribbon read and connect timeout, 4000ms.
  2018-08-21 19:18:32.752  WARN 13534 --- [io-8765-exec-10] o.s.c.n.z.filters.post.SendErrorFilter   : Error during filtering
  
  com.netflix.zuul.exception.ZuulException: 
      at org.springframework.cloud.netflix.zuul.filters.post.SendErrorFilter.findZuulException(SendErrorFilter.java:114) ~[spring-cloud-netflix-zuul-2.0.1.RELEASE.jar:2.0.1.RELEASE]
      at org.springframework.cloud.netflix.zuul.filters.post.SendErrorFilter.run(SendErrorFilter.java:76) ~[spring-cloud-netflix-zuul-2.0.1.RELEASE.jar:2.0.1.RELEASE]
      at com.netflix.zuul.ZuulFilter.runFilter(ZuulFilter.java:117) [zuul-core-1.3.1.jar:1.3.1]
      at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:193) [zuul-core-1.3.1.jar:1.3.1]
      at com.netflix.zuul.FilterProcessor.runFilters(FilterProcessor.java:157) [zuul-core-1.3.1.jar:1.3.1]
      at com.netflix.zuul.FilterProcessor.error(FilterProcessor.java:105) [zuul-core-1.3.1.jar:1.3.1]
      at com.netflix.zuul.ZuulRunner.error(ZuulRunner.java:112) [zuul-core-1.3.1.jar:1.3.1]
  </code></pre>