Add common module managing common services and scripts (act_runner, create/restore backups)

Fix script environment variables
Add Fefan configuration
Fix gateway services file provisionning through ssh

terraform.tfvars.example

@@ -1,6 +1,4 @@
 ssh_public_key = "<ssh-public-key>"
 proxmox_api_token = "<proxmox-api-token>"
 proxmox_endpoint = "http://mop:8006"
-proxmox_host_ip = "192.168.1.121"
-gateway_repository = "../gateway"
-gateway_token = "xxx"
+proxmox_host_ip = "192.168.1.121"