* 403 Password Expired is now correctly returned for
POST /login_jwt when a password is expired, instead of
returning the token.
* 403 Password Expired is now correctly returned for API requests
and redirect to /changepassword only happens for non API requests.
* improve Utils::Auth::check_max_age() to accept also $auth_user and
$ngcp_realm for cases (like /login_jwt) where there is an
authenticated user but there is no $c->user.
Change-Id: I302ad8654bdf16fe0882625fd6e9a8bba7a8ad42