[terraform/openstack] README.md Guide expanded
[terraform/openstack] README.md Guide expanded

Add section how to configure k8s cluster and set up kubectl
kubespray/kargo,Atoms/kubespray,Atoms/kubespray,kubernetes-incubator/kargo,insequent/kargo,Atoms/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray,ayaz/kubespray,kubernetes-incubator/kubespray,kubernetes-sigs/kubespray,Lendico/kargo,kubernetes-incubator/kargo,kubernetes-sigs/kubespray,kubernetes-sigs/kubespray,Lendico/kargo,sgm-media/kargo,Abdelsalam-Abbas/kubespray_fork,kubespray/kargo,insequent/kargo,kubernetes-incubator/kubespray,Abdelsalam-Abbas/kubespray_fork,sgm-media/kargo,ayaz/kubespray