make the pool name a function of the vm name

multiple/shared_modules/cloud-init.tf

@@ -3,6 +3,6 @@ resource "libvirt_cloudinit_disk" "commoninit" {
   user_data = templatefile("${path.module}/cloud_init.yaml", {
     ssh_key = var.ssh_key
   })
-  pool      = var.pool_name
+  pool      =  "${var.vm_name}-pool"
   depends_on = [libvirt_pool.tf_tmp_storage]
 }