By Harry Papachristou ATHENS (Reuters) - Greece's weakened coalition government is expected to survive the departure of a junior partner for now but will be forced to resist any fresh demands from its foreign lenders to prevent its tiny parliamentary majority from crumbling. A year after coming to power, Prime Minister Antonis Samaras suffered a heavy blow when his smallest coalition partner, the Democratic Left, quit the government last week to protest the abrupt closure of state broadcaster ERT. ...