protokube: put etcd data location in same place as before
protokube: put etcd data location in same place as before

Enables upgrade from kube-up

spacexnice/kube-deploy,isavin/kube-deploy,spacexnice/kube-deploy,justinsb/kube-deploy,ajitak/kube-deploy,ostrichops/kube-deploy,ostrichops/kube-deploy,krousey/kube-deploy,luxas/kube-deploy,isavin/kube-deploy,ostrichops/kube-deploy,justinsb/kube-deploy,spacexnice/kube-deploy,luxas/kube-deploy,luxas/kube-deploy,krousey/kube-deploy,justinsb/kube-deploy,isavin/kube-deploy,ajitak/kube-deploy