One line had the outgoing "Late Show" host snort-laughing on air. Julia Louis-Dreyfus jumped back into her “Veep” character Selina Meyer on Tuesday to deliver a savage tribute to Stephen Colbert on one of his final episodes of “The Late Show.” Louis-Dreyfus, promoting her new film “The Sheep Detectives,” began by noting to Colbert how “people have been coming on the show recently to sing your praises and give you gifts” ahead of his last show on May 21. “You know how much I love you. I really