Remove run_mode for error

In 2.7 we get this error

```puppet

err: syntax error on line 0, col 72: `Mysql::Error: Can't create/write to file '/tmp/#sql_627_0.MYI' (Errcode: 13): SHOW FIELDS FROM `inventory_nodes`'
err: Try 'puppet help catalog seed' for usage

```

prior to this commit I was being hacky, this commit reinstates the need for
`