By Karolina Tagaris and David Stamp ATHENS (Reuters) - Veteran Greek leftist Panagiotis Lafazanis parted ways with his old comrade Alexis Tsipras on Friday, founding a new party dedicated to finishing off the country's bailout before the bailout finishes off the country. Lafazanis has led a group of dissident lawmakers in splitting from the outgoing prime minister's Syriza party to contest a snap election which is expected next month. With a founding membership of 25 lawmakers, the Popular Unity party immediately becomes the third biggest force in parliament behind the dominant Syriza and conservative opposition New Democracy.