FRANKFURT — No one saw this coming. Eurozone finance ministers on Monday picked Croatia’s central bank governor, Boris Vujčić, as the European Central Bank’s next vice president — defying all expectations and the European Parliament’s calls for someone else. Ministers chose Vujčić over his Finnish counterpart Olli Rehn, the favorite to win, in the third and final round of voting after seeing off other heavyweight contenders in Portugal’s  Mário Centeno and Latvia’s  Mārtiņš Kazāks — the