Make the authtest login plugin provide more info
    
    Provide more variables to test for in allow attribute and mapping
    testing.
    
    Adds givenname (Test User), surname (the username) and
    email (username@example.com).
    
    https://fedorahosted.org/ipsilon/ticket/25
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-by: Simo Sorce <simo@redhat.com>