The convention is right there in the `:mysql` section that was deleted:

```ruby
      :mysql => {
        :server_root_password => 'rootpass',
        :server_debian_password => 'debpass',
        :server_repl_password => 'replpass'
      }
```

Using this makes it clear that this is just a testing password that won't get you into anything instead of being pseudoclever by adding numbers to the end of a word to possibly make it somehow more secure.