Swirling confetti, blaring music, loud cheering and excited applause are not the sort of things one expects to see at a funeral. Yet there was an undeniable aura of excitement Friday as New York Democrats laid their party to rest.  There were no mourners at the last rites in Syracuse, only several thousand giddy born-again socialists.  The convention formalities were limited to perfunctory nominations of incumbents for statewide offices. Despite some grumbling, there was never any doubt that