Add proxy for subscription-manager (#8012)
Add proxy for subscription-manager (#8012)

If using proxy, it is necessary to configure it before running
"subscription-manager status" command.
This adds the step.
kubernetes-incubator/kubespray,kubernetes-incubator/kubespray,kubernetes-sigs/kubespray,Atoms/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray