changed time.Time field to be *time.Time so that null can be parsed correctly
changed time.Time field to be *time.Time so that null can be parsed correctly

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