config_settings: {get_attr: [NovaComputeBase, role_data, config_settings]}
step_config: &step_config
get_attr: [NovaComputeBase, role_data, step_config]
config_settings: {get_attr: [NovaComputeBase, role_data, config_settings]}
step_config: &step_config
get_attr: [NovaComputeBase, role_data, step_config]