Export ohpc instance id

Accessible by calling module.create-ohpc-instance.id
 will return a string

ohpc-instance/main.tf

@@ -52,6 +52,10 @@ resource "openstack_compute_floatingip_associate_v2" "ohpc" {
   }
 }
 
+output "id" {
+    value = openstack_compute_instance_v2.ohpc.id
+}
+
 output "ssh_host" {
     value = format(var.host_prefix,element(split(".", var.floating_ip_ohpc),3,),)
-}
\ No newline at end of file
+}