By Nqobile Dludla and Tim Cocks JOHANNESBURG (Reuters) -Gunmen armed with rifles and pistols opened fire at people in a bar in the South African township of Soweto in the early hours of Sunday, killing 15 and wounding nine, police said. The carnage took place shortly after midnight, when an unknown number of gunmen entered the Orlando East tavern, in the township on the outskirts of the main city Johannesburg, spraying bullets at its patrons, police and witnesses said. “Some were shot in the head, you could see their brains spilling out,” said Thobani Mhlabiso, 26, a bar waiter who hid behind …