By Antoaneta Bezlova   BEIJING - Even as it expands economic cooperation with its wary Southeast Asian neighbors, China's thirst for energy is compelling it to resurrect territorial claims to resources-rich spots in the region that have lain dormant for years.   China's decision in late 2007 to create a new city administration responsible for the archipelagos of the Paracels and Spratlys islands in the South China Sea may not have made waves at home, but it sparked tensions in the region and foc...