DUBAI, Nov 16 (Reuters) - Dubai&aposs Drake & Scull DSI.DU (DSI) reported a 10 percent drop in third-quarter profit on Sunday, beating analyst estimates as revenue increased.The contractors made a net profit attributable to shareholders of 21.4 million dirhams ($5.83 million) in the three months to Sept. 30, down from 23.8 million dirhams in the year-earlier period, according to a statement to Dub