RUPAM JAIN and CHARLOTTE GREENFIELD INTERNATIONAL troops plan to stay in Afghanistan beyond the May deadline envisaged by the insurgent Taliban's deal with the United States, four senior NATO officials said, a move that could escalate tensions with the Taliban demanding full withdrawal. "There will be no full withdrawal by allies by April-end," one of the officials told Reuters. "Conditions have not been met," he said on condition of anonymity because of the sensitivity of the matter. "And with the new U.S. administration, there will be tweaks in the policy, the sense of hasty withdrawal which was prevalent will be…