clearlinux-pkgs/kubernetes installs kubeadm kubelet of the same version
and kubeadm uses/fallsback to stable branch of its major+minor version when
generating kubernetes component manifests if none is provided. This
helps with staying upto date with any fixes without any further
modifications
```
vagrant@clr-01 ~ $ bash /vagrant/create_stack.sh
I1207 21:37:25.285850 16086 version.go:236] remote version is much newer: v1.13.0; falling back to: stable-1.12
[init] using Kubernetes version: v1.12.3
```
Signed-off-by: Saikrishna Edupuganti <saikrishna.edupuganti@intel.com>