“House of Flowers” was supposed to be the big Broadway hit of 1954. An O. Henry Prize-winning short story by Truman Capote, lyrics by Capote and Harold Arlen, music by Arlen’s, director Peter Brook (fresh from Covent Garden), George Balanchine choreographing, and Pearl Bailey and Diahann Carroll starring. But the show flopped, and remained dormant for almost 50 years. Now it’s back for another look…