(This July 14 story corrects to state Farah was enrolled at two primary schools and attended Feltham Community College at 11) LONDON (Reuters) – London’s Metropolitan Police said it had opened an investigation after multiple Olympic and world champion athlete Mo Farah told a BBC documentary that he was a victim of child trafficking. The 39-year-old said he was brought to Britain from Djibouti at the age of nine and was forced to do housework in exchange for food. “Specialist officers have opened an investigation and are currently assessing the available information,” the Metropolitan Police sa…