By Lenn Thompson, Executive Editor Next Saturday, Roanoke Vineyards will host "The Judgment of Riverhead" a tasting that is modeled, quite obviously, after "The Judgment of Paris." Top wines from California and France — wines scored 90 or higher by The Wine Advocate or Wine Spectator, from $40 to $140 — will face off against top wine from Long Island in a blind tasting. The wines will be tasted by a panel of nine wine and restaurant industry professionals — including yours truly — using a 20-point scale, just like at the original 1976 event in Paris. A group of…