For anyone who has heard his work -- and there is a lot, on four CDs, from Blossom in 2003 to last year's Impermance -- AGORIA'S gig at Julep on Thursday night, September 20, was one of the most anticipated house music performances of the season. Would the Lyon, France resident, as a DJ, live up to the smooth, Euro soundscapes and robust, reverb rhythms that distinguish his track productions? After all, this writer has seen top-ranked producers come from Europe to Boston in DJ mode and crap out.