At Rumaila, Iraq’s most prolific oil field, the development budget has been slashed this year by $1 billion – the latest sign that Iraq is tempering its long-term oil production ambitions.Even as the country works to raise production and export capacity – Iraq sold record amounts of oil in March and April – the increases are smaller than many anticipated, including Iraqi policymakers. Their ambitions have been chastened by reduced oil prices, a financial crisis, infrastructure delays a…