Tweak Clocks alarm test for change in upstream code
    
    Upstream now sets an alarm with no explicit recurrence inactive
    after it is stopped (previously it assumed recurrence every day).
    We need the test to handle both behaviours for a while (until
    we are no longer testing < 46.0 anywhere).
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>