[BUG] Changing the default Kubernetes certificate location results in a cluster deployment error

[przemyslavic]

Describe the bug
Changing the default Kubernetes certificate location results in a cluster deployment error - the installations fails trying to initialize the cluster while the kubelet service is not running.

To Reproduce
Steps to reproduce the bug:

1. Deploy a new cluster from develop branch with the configuration given below (changing the default certificate location /etc/kubernetes/pki to a different one): epicli apply -f test.yml

Config files

---
kind: configuration/kubernetes-master
title: "Kubernetes Master Config"
name: default
provider: azure
specification:
  advanced:
    certificates:
      location: /etc/kube-certs/pki
      expiration_days: 365
      renew: false

Expected behavior
The cluster has been deployed successfully.

OS (please complete the following information):

• OS: [all]

Cloud Environment (please complete the following information):

• Cloud Provider [all]

Additional context
Log:

2020-09-15T12:54:22.1590201Z    [38;21m12:54:22 INFO cli.engine.ansible.AnsibleCommand - TASK [kubernetes_master : Initialize Kubernetes cluster] ***********************    [0m
2020-09-15T12:58:27.4272444Z    [31;21m12:58:27 ERROR cli.engine.ansible.AnsibleCommand - fatal: [ec2-xx-xx-xx-xx.eu-west-1.compute.amazonaws.com]: FAILED

This error is likely caused by:\n\t\t- The kubelet is not running\n\t\t- The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)\n\n\tIf you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:\n\t\t- 'systemctl status kubelet'\n\t\t- 'journalctl -xeu kubelet'

The problem is that the path /etc/kubernetes/pki is hardcoded in many places and therefore we are not able to change the certificate locations in one place at the moment. In my opinion, we should control this parameter in one place.

[przemyslavic]

✔️ apply
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✔️ upgrade from v 1.0.1 to 1.3.0dev