A new barbecue joint is opening in Roosevelt Row. Phil "Phil the Grill" Johnson is opening BBQ Trapp Haus at 511 E. Roosevelt St., which is home to future 26,000-square-foot mixed-use development The Blocks, helmed by Desert Viking Development. Johnson will be joining Phoenix Public Market Cafe and St. Francis owner Aaron Chamberlin, who is opening a new concept called Taco Chelo, at The Blocks, designed by AV3 Design Studios and Form Third Design-Build at Roosevelt and Fifth streets in the artsy…