A court fight in Jamaica is putting a bigger question on trial than just the fate of one beach: As high-end tourism projects spread, will Jamaicans retain access to their coastline or be shut out? Campaigners say Mammee Bay, in particular, shows what is at stake, arguing that a shoreline long used by local people to make a living has been closed off to serve a resort economy that benefits some far more than others. What happened? One of the lead…