title: operation name appended to Backend service UrL in azure API management
body: <p>I have a logic app with http trigger. I am trying to create a proxy for the logic app using APi management. The issue I am facing is that APi management when calling the Logic App, adds operation name which makes the logic app url invalid.
  Example: logic app url: azure/invoke
  API manager operation name: pass</p>
  
  <p>Looking at trace logs, URL to call Logic app is:
  azure/invoke/pass</p>
  
  <p>I am trying to manually add url to backend service with Blank API design instead of using LogicApp.</p>