1.0.3: Node group name arguments (node_group_name and node_group_role_name) …
…(#2) * new node_group_name and node_group_role_name optional arguments to override hard-wired defaults * example for named node group arguments
…(#2) * new node_group_name and node_group_role_name optional arguments to override hard-wired defaults * example for named node group arguments