Seafood gumbo, crawfish etouffee, and sugar-dusted beignets entice visitors to New Orleans. Along with Mardi Gras and the Jazz and Heritage Festival, of course.   But these days, the city’s hotel scene is also getting some special attention.   Luxury hotel brands Caesars and Fairmont are set to add new properties in the Crescent City. Plus, new boutique hotels are opening, and historic favorites are being renovated.   Plus, most of the new additions include restaurants that are offering the food that’s helped make New...