Fix for Terraform provisioning #103

[Cbkhare]

Description

PR enables the terraform setup creation and installation of dependent packages like docker and docker-compose.
This script is written in such a way where it can be extended to add the other dependent packages.

Why is this needed

tinkerbell/tinkerbell.org#103

Fixes: #

• Added a script to install dependent packages.

How Has This Been Tested?

Testing has been completed by creating tink-provisioner using terraform for OS centos_8 and ubuntu_18_04. Below are the test results.

• Ubunut result

root@tink-provisioner-cb:~# lsb_release -a 
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.5 LTS
Release:	18.04
Codename:	bionic
root@tink-provisioner-cb:~# docker --version 
Docker version 19.03.6, build 369ce74a3c
root@tink-provisioner-cb:~# docker-compose --version 
docker-compose version 1.17.1, build unknown

• Centos result

[root@tink-provisioner-cb ~]# lsb_release -a 
LSB Version:	:core-4.1-amd64:core-4.1-noarch
Distributor ID:	CentOS
Description:	CentOS Linux release 8.1.1911 (Core) 
Release:	8.1.1911
Codename:	Core
[root@tink-provisioner-cb ~]# docker --version 
Docker version 19.03.12, build 48a66213fe
[root@tink-provisioner-cb ~]# docker-compose --version 
docker-compose version 1.26.2, build unknown

Documentation required

• Status of execution of the script can be checked from location /var/log/cloud-init-output.log

[gianarb]

@Cbkhare can you revert this commit ee46b71 back from your branch and rebase to master?!

Thanks

[gianarb]

Thank you for taking care of it!