HAVANA — In a landmark act of sports diplomacy, soccer’s New York Cosmos today will become the first U.S. professional team to play in Cuba since Presidents Raul Castro and Barack Obama announced their countries would re-establish diplomatic relations.Soccer’s popularity is growing in both baseball-crazy nations and Cuban officials said the friendly match against the country’s national team would be an important step in the normalization of the relationship between the U.S. and Cuba.“In this …