John Hopewell Chief International CorrespondentTop European TV fest Series Mania bowed with a bang at Thursday’s opening night in-person gala in Lille, northern France hosting the international premiere of the ITV Studios-sold “Vigil.”Juries and programming were presented to a hugely enthusiastic 1,200 spectator audience packing out Lille’s main Nouveau Siècle theater.The bang, when it came to “Vigil,” a BBC nuclear submarine thriller, came via a tremendous opening scene of a Scottish fishing