[Openstack] Add security groups not managed by terraform (#6865)

* add custom sec groups

* make sure groups are applied only when created

* fix spacing

contrib/terraform/openstack/kubespray.tf

@@ -80,6 +80,8 @@ module "compute" {
   wait_for_floatingip                          = var.wait_for_floatingip
   use_access_ip                                = var.use_access_ip
   use_server_groups                            = var.use_server_groups
+  extra_sec_groups                             = var.extra_sec_groups
+  extra_sec_groups_name                        = var.extra_sec_groups_name
 
   network_id = module.network.router_id
 }