Add test case for OTP login
    
    Add integration tests to verify HOTP, TOTP, service with OTP auth
    indicator.
    
    Related: https://pagure.io/freeipa/issue/7804
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>