Upgrades to Terraform V0.7
Upgrades to Terraform V0.7

The template_file resource is deprecated in Terraform V0.7,
giving a warning to use the data source instead. These changes
upgrade to the data source for template_file and remove the warning.

See https://www.terraform.io/upgrade-guides/0-7.html

nomkhonwaan/kubernetes-digitalocean-terraform,alpe/kubernetes-digitalocean-terraform,hermanjunge/kubernetes-digitalocean-terraform,kubernetes-digitalocean-terraform/kubernetes-digitalocean-terraform