Naman Ramachandran In today’s Global Bulletin, Discovery orders “Billy Buys Brooklyn”; BBC sells quiz formats; AfterShock hires and promotes; and NBCUniversal’s “Transplant” heads to Africa.Discovery has commissioned “Billy Buys Brooklyn,” a series featuring antiques dealer Billy Leroy, star of the long-running Travel Channel series “Baggage Battles.”Produced by MY Entertainment, “Billy Buys Brooklyn” follows the eccentric dealer on his latest venture: a brand new vintage, antiques and