VIENNA — Questions aren’t going away for the Eurovision Song Contest. No matter the result of Saturday night’s Eurovision grand finale, the broadcasting union behind the contest is facing tough questions about how countries are cleared to compete.  In a hair-raising finish last night, Bulgaria’s underdog entrant DARA leaped past Israel’s Noam Bettan to take the top prize. The earworm dance anthem “Bangaranga” earned Bulgaria its first Eurovision win, produced the biggest victory margin ever