By Andreas Rinke and Sarah Marsh BERLIN (Reuters) – Germany’s ruling coalition is divided over whether to let China’s Cosco take a stake in a Hamburg port terminal, government sources say, even as Beijing urges Berlin not to politicize the bid and the port authority warns this could hurt the economy. Shipping giant Cosco last year made a bid to take a 35% stake in one of three terminals in Germany’s largest port in the northern city of Hamburg. The German government’s response is being seen as a gauge of how far it is willing to toughen its stance on China, its top trading partner, due to conc…