By Michael Georgy BAGHDAD (Reuters) - Britain will boost the number of its army trainers in Iraq in the coming weeks to support the Iraqi armed forces' battle against Islamic State militants, the British defense secretary said on a visit to Baghdad on Wednesday. Britain*said last month it had deployed a team of trainers to*Iraq*to help Kurdish peshmerga fighters maintain and use heavy machineguns against the radical militants who have taken over much of Iraq and Syria in a ruthless military onslaught. Britain planes have also participated in U.S. ...