title: SAPUI5 OData v4 model authentication with cookie
body: <p>i'm currently trying to consume an OData v4 service with the OData v4 model of OpenUI5. The service requires an authentication by sending a session id as a cookie. </p>
  
  <p>My problem is now that the model does not include the cookie in the generated request header so that i'm getting <em>not authorised</em> as a response.
  The session id is set in the <em>document.cookie</em> with the correct name and value but i can see in the developer tools of my browser that the cookie is not part of the request header.</p>
  
  <p>I hope you can help me with this problem. Many thanks in advance!</p>