Add packer template for proxy build

Add packer template code to build a proxy node

openstack-ood/nodeimage.pkr.hcl

@@ -39,7 +39,7 @@ build {
   provisioner "ansible" {
     use_proxy     = false
     user          = var.ssh_username
-    groups        = ["ood"]
+    groups        = ["ood", "knightly"]
     playbook_file = "./ansible/ood.yml"
     roles_path    = "./ansible/roles"
     extra_arguments = [