WIP To test overall workflow of xml-signer

To test: Add an entry under labwiki:session:

labwiki
  session
    authorisation_url: "http://localhost/index.php"
    # or
    authorisation_url:
    "http://gentle-journey-8139.herokuapp.com/index.php"
WIP Authorisation cbk_url shall be configured too

labwiki:
  session:
    authorisation:
      url: xxx
      callback_url: xxx