The new musical adaptation of "The Great Gatsby" on Broadway seems to be in a race to outdo other shows that feature more rain than you can shake a stick at and more cars than Jerry Seinfeld could handle. Jay Gatsby, the self-made enigma and party king of West Egg, Long Island, is a man of insecurities hidden behind a facade of wealth, constantly teetering on the edge of exposure. Like all men.   In this dazzling Jazz Age production, Gatsby’s grand gestures to impress the high society, from showcasing his Oxford photo like a desperate salesman to transforming his neighbor Nick's