Prepare providon of multiple environments from same IaC.

IaC/main.tf

@@ -11,5 +11,5 @@ required_version = ">= 0.14.0"
 
 # Configure the OpenStack Provider
 provider "openstack" {
-  cloud = "dco-matrixtest"
+  cloud = "${var.cloud_name}"
 }

IaC/vars.tf

@@ -34,3 +34,7 @@ variable "controller_name" {
 variable "dns_suffix" {
   default = "matrix.test.sunet.se"
 }
+
+variable "cloud_name" {
+  default="dco-matrixtest"
+}