copyFile: close source and destination file handles
copyFile: close source and destination file handles

kubernetes-incubator/bootkube,ericchiang/bootkube,dghubble/bootkube,diegs/bootkube,dghubble/bootkube,kubernetes-incubator/bootkube,kubernetes-incubator/bootkube,hongchaodeng/bootkube,hongchaodeng/bootkube,diegs/bootkube,hongchaodeng/bootkube,dghubble/bootkube,ericchiang/bootkube,diegs/bootkube,ericchiang/bootkube