[session-handler] use session directly to update last usage
We don't really need the WebRequest for that. Not using the WebRequest to access
the cubicweb repository here will allow a delayed set_session.
Related to #2503918
/*
* cubicweb js mock for unit tests
* This module defines variables and functions used in quite a few places
* in cw js framework that can't be used or guessed without a real CW server
*/
var pageid = 'my-page-id';
function _(message) {
return message;
}