title: web api with swagger versioning, ResolveVersionSupportByRouteConstraint not found
body: <p>I have the api portion working but in my swaggerconfig it cannot find ResolveVersionSupportByRouteConstraint in </p>
  
  <pre><code>c.MultipleApiVersions(
  (apiDesc, targetApiVersion) =&gt; ResolveVersionSupportByRouteConstraint(apiDesc, targetApiVersion),
  (vc) =&gt;
  {
      vc.Version("v2", "Swashbuckle Dummy API V2");
      vc.Version("v1", "Swashbuckle Dummy API V1");
  });
  </code></pre>
  
  <p>This causes my api import into azure api management to fail because the swagger docs returns an error :(</p>