Netflix’s upcoming film “The Laundromat” makes a fictionalized, star-studded comedy out of the 2016 Panama Papers scandal, turning Meryl Streep into a bereaved widow bent on exposing the illicit world of global tax evasion, and Gary Oldman and Antonio Banderas into the cackling, flashily-dressed duo at the head of Mossack Fonseca & Co, the firm that was at the center of the Panama Papers investigation and that was once the fourth largest provider of offshore financial services.