omit OS code if not present, do not pass empty string
omit OS code if not present, do not pass empty string

eirslett/softlayer-go,TheWeatherCompany/softlayer-go,TheWeatherCompany/softlayer-go,maximilien/softlayer-go,jianqiu/softlayer-go,jianqiu/softlayer-go,maximilien/softlayer-go,eirslett/softlayer-go,mattcui/softlayer-go,mattcui/softlayer-go