SAN DIEGO – A Holocaust survivor living in San Diego can continue his legal battle against the Spanish government to reclaim a valuable painting he contends his grandmother was forced to sell for about $360 to escape the Nazis, a federal appeals court ruled Thursday. Claude Cassirer, 89, sued Spain’s government in 2005, along with the foundation that runs the Thyssen-Bornemisza Museum in Madrid, where the painting by Camille Pissarro is on display.