title: Akka Stream & Kamon-Prometheus not returning any metrics but loads an empty page
body: <p>I tried to integrate kamon-prometheus with akka stream project but at <a href="http://localhost:9095/" rel="nofollow noreferrer">http://localhost:9095/</a> it loads an empty page.In the console I could see the message that metrics information is available at <a href="http://localhost:9095/" rel="nofollow noreferrer">http://localhost:9095/</a>.
  When I tried with akka quickstart project, it worked fine.</p>
  
  <p>Is kamon supported for akka streams?</p>