He’s the Tony Soprano of the horse-and-buggy set. His name is Lebanon Levi, and he’s the chief enforcer and focal point of “Amish Mafia,” a new docu-series premiering next month on Discovery. The series, which follows on the heels of sister network TLC’s top-rated (and extremely controversial) “Breaking Amish,” centers around tough-guy Levi and his henchmen Alvin, Jolin and John — who quietly enforce justice and protect the Amish community in Lancaster, Pa., while church elders look the other way and no one asks questions.