BRUSSELS (Reuters) - Jean-Francois van Boxmeer, chief executive of Dutch brewer Heineken for the past 15 years, will step down on June 1 and be replaced by the head of the company's Asia-Pacific region, the world's second largest beer maker said on Tuesday.The brewer of Europe's top lager Heineken, as well as Sol, Tiger and Strongbow cider, announced the change a day before it publishes its 2019 results.Belgian Van Boxmeer, 58, joined Heineken in 1984 as a trainee and took a number of..