and convert shell script to go script

Remove kubeadm pull images

Adds support for specifying kubernetes version and preloading docker
images into the kic base image.

Though this increases the kic base image by ~1.6G, it should improve
start latency in conjunction with removing 'kubeadm pull images' in
another PR.

Fix deb and rpm endpoints in docs

Fix pause documentation

Update docs site for v1.7.x

Add kubeadm tests for v1.19 and v1.18

update releases.json to include v1.7.1

Version bump to v1.7.1

Revert role change from cluster-admin->system:persistent-volume-provisioner

gvisor fixes for v1.7.0

Create directory using os.MkDirAll, as mkdir -p does not work on windows

Remove pod list stability double check

Use cluster-dns IP setup by kubeadm

Skip driver autodetection if driver is already set

Customizing host path for dynamically provisioned PersistentVolumes