MIAMI — Jerry Falwell Jr. looks ready to sever ties with the South Beach hostel that launched the “pool boy” sex saga, though the pending deal is tied up in a court fight. In 2013, a company set up by the former evangelical leader’s son paid $4.7 million for the two-story building at 810 Alton Road that housed a liquor store, restaurant and a cut-rate hostel in the heart of South Beach. The odd part was Falwell’s business partner in the property: Giancarlo Granda, who befriended Jerry and his wife, Becki, the year before while he was a 20-year-old pool attendant at the Fontainebleau hotel in M…