LOS ANGELES — The director who presided over the J. Paul Getty Museum during some of its most tumultuous and exciting times said Thursday he is resigning at the end of the month. Michael Brand, an acclaimed expert in Indian art, has directed the museum since December 2005. He said he was leaving a year before his five-year contract was up to pursue other interests but would stay on as a consultant until the end of the summer. Brand took over the Getty when it was immersed in an embarrassing international scandal, with the governments of Italy and Greece accusing it of acquiring scores of valuable art objects stolen from their countries. The J.