Mark Twain’s Tom Sawyer may have been the first fictional character to actually do it. It was likewise beautifully executed by Robert Duvall in the 2009 film “Get Low.” And, I am certain, many people have contemplated it themselves. So it came as no shock that Ms. Ruby (Judith Roberts) decided to throw and attend her own funeral in Lisa D’Armour’s new play, “Airline Highway,” about the city and people of New Orleans. “Airline Highway” is currently being staged at …