Fix pool_status so that failback_command and fail_over_on_backend_error show correct values.
Fix pool_status so that failback_command and fail_over_on_backend_error
show correct values.

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres