This summer I attended the Fête de Rosette, in the Savoie region of France. A fledgling festival of Irish talents both established and fringe, Connor McCann was a highlight among his contemporaries – his Americana-infused balladry, married with the atmosphere of the Alpine valleys, was a treat for the senses. That’s not to say he’s any less enthralling when playing closer to home. The influence McCann is having on the candle-lit folk sessions of Belfast’s music bars seems initially novel, but in fact has been brewing for some time. While the Glenravel-born artist has pedigree as frontman of disbanded alt-rockers…