By Neil Jerome Morales and Adrian Portugal MANILA (Reuters) -The Philippines’ main gateway scrambled to resume full services on Monday after a New Year power outage jolted its air traffic control and disrupted 300 flights, prompting calls from business leaders and a top senator for urgent action. A failure of primary and secondary power supplies caused the outage at Ninoy Aquino airport, and it should take about 72 hours for airlines to normalise their operations, said Cesar Chiong, general manager of the Manila International Airport Authority. There were 361 flights delayed, cancelled or dive…