M #-: Support for packet when Terraform >= 0.13 (#925)

Signed-off-by: Ricardo Diaz <rdiaz@opennebula.io>

src/oneprovision/lib/terraform/providers/templates/packet/provider.erb

@@ -1,3 +1,12 @@
+terraform {
+    required_providers {
+        packet = {
+            source = "packethost/packet"
+        }
+    }
+    required_version = ">= 0.13"
+}
+
 provider "packet" {
     auth_token = "<%= conn['TOKEN'] %>"
 }