(Corrects number of votes against Tusk in paragraph 3) By Anna Koper and Pawel Florkiewicz WARSAW (Reuters) -Poland’s parliament voted in favour of Donald Tusk becoming prime minister on Monday, putting an end to eight years of nationalist rule and setting the stage for a thawing of relations with the European Union. Poland has seen tens of billions of euros of European Union funds frozen due to a dispute with Brussels over democratic standards, but Tusk, a former European Council president, has vowed to mend relations and unblock the cash. 248 were in favour of Tusk becoming prime minister an…