In one of the first electoral tests on the continent since the Brexit and Trump political earthquakes, Austrians are slated to go to the polls Sunday — for the last time, they hope — in a rerun of a presidential election that pits a far-right populist against a left-wing independent. Regardless of who wins, the president-elect for the first time will not come from either of the country’s two main centrist parties that have dominated the tiny Alpine nation’s politics since the end of World War II, suggesting that Austrian voters — like their American and British counterparts — are sick of their traditional political elites and ready for something radically new. The faceoff is between Norbert Hofer, 45, of the euroskeptic, anti-immigration Freedom Party founded by former Nazis in 1955 and Alexander…