* U.S. currently restricts crude oil exports * US crude oil output for first quarter highest in 14 yrs * Gerard says sees change in attitude of Obama admin By Ayesha Rascoe and Timothy Gardner WASHINGTON, June 15 (Reuters) - As U.S. oil production climbs to record levels, the United States should eventually consider easing its restrictions on crude exports, the head of a powerful oil lobbying group said on Friday. U.S. oil production hit the highest quarterly level in 14 y