CANADA STOCKS-CP Rail and energy shares drive TSX higher

* TSX up 42.21 points, 0.28 percent, at 15,246.69 * Eight of the 10 main index sectors advance * CP Rail extends run after Thursday's earnings report By John Tilak TORONTO, July 18 (Reuters) - Canada's main stock index climbed on Friday, supported by gains in shares of energy producers and Canadian Pacific Railway Ltd, as investors shrugged off worries about heightening tensions in Ukraine. World leaders called for an international investigation after a Malaysian airliner wi