0 Have your say DUANNE OLIVIER has described the chance to join Yorkshire as the “deal of a lifetime” after turning his back on international cricket to sign a three-year Kolpak contract with the club. The South African quick, who this week broke into the top-20 of the world Test bowling rankings, is the latest to quit the South African system after the likes of Hampshire’s Kyle Abbott and Rilee Rossouw.Olivier, 26, has shot to prominence in international cricket this winter, taking 24 wickets in the 3-0 clean sweep of Pakistan that saw him named man-of-the-series, following it up with another seven wickets in two Test matches against Sri Lanka.His loss is a big blow to South Africa, who fought hard to keep him, but with competition for bowling places fierce and with the country still operating a quota system, whereby the target is for an average of six players of colour in the first XI, he has chosen the comparative security of English domestic cricket.“I would be lying if I said this wasn’t a difficult decision to make,” said Olivier, who will shortly link up with Yorkshire on their pre-season tour to Potchefstroom.“It’s giving up playing for my country…