When no rule is set to two_factor in ACL configuration, 2FA is
considered disabled. Therefore, when a user cannot be redirected
correctly because no target URL is provided or the URL is unsafe,
the user is either redirected to the default URL or to the
'already authenticated' view instead of the second factor view.
Fixes#683
* Redirect to default URL after 1FA when default policy is one_factor.
User is now redirected to the default redirection URL after 1FA if
the default policy is set to one_factor and there is no target URL
or if the target URL is unsafe.
Also, if the default policy is set to one_factor and the user is already
authenticated, if she visits the login portal, the 'already authenticated'
view is displayed with a logout button.
This fixes#581.
* Update users.yml
* Fix permissions issue causing suite test failure
Amir Zarrinkafsh
Clément Michaud