[Greek PM Tsipras attends a parliamentary session before a vote on tax and pension reforms in Athens]ATHENS (Reuters) - Greek Prime Minister Alexis Tsipras reshuffled his cabinet late on Friday to try to speed up reforms agreed under an international bailout and shore up his government's popularity. Tsipras signalled that he would stay the fiscal course agreed with the European Union and the International Monetary Fund by leaving his finance minister, Euclid Tsakalotos, in his post. He appointed Dimitris Liakos, the chief of his economic office and a former fund manager, as minister responsible for the implementation of Greece's bailout programme. ...