Comment 4 for bug 1526976

Reviewed: https://review.openstack.org/263952
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=7ce8ce92e7c84ba5ff01130843efd45fa39aa334
Submitter: Jenkins
Branch: stable/liberty

commit 7ce8ce92e7c84ba5ff01130843efd45fa39aa334
Author: Haneef Ali <email address hidden>
Date: Fri Dec 18 09:34:18 2015 -0800

    Fix 500 error when no fernet token is passed

    Keystone returns internal server error if the
    user doesn't send any token. This happens only for
    fernet token. This review returns 401 if the token
    is not passed. Logic is moved from provider to
    controller layer.

    Since the logic has movoed to controller, some
    of code which directly checks for no token in
    the provider and their corresponding tests
    has been removed from the token providers
    as they are redundant.

    Closes-Bug: 1526976

    Change-Id: I0b6b0c48d6c841f996d1b8711d6c343ddfd5d945
    (cherry picked from commit 171f0e2193f336c02646e4366764d53336b10c8b)