Elastic/logstash puppet forge module config_dir not being set

[cgutshal]

I am working with the following module in puppet forge:
https://forge.puppet.com/elastic/logstash

This is my current profile: https://gist.github.com/cgutshal/116d2cfd1bd21b9083088bfbacd1a804

The issue I am running into is that while my pipeline configs are places in /data/logstash/conf/conf.d/ as expected, the other config files are still created in /etc/logstash regardless of if I define it as follows in my profile.

  $base_dir = '/data/logstash'

  file { $base_dir:
    ensure  => 'directory',
    group   => $config['group'],
    owner   => $config['user']
  }

  class { 'logstash':
    config_dir          => "${base_dir}/conf", #THIS ISN'T WORKING
    ...
  }

Not sure what I might be doing wrong that isn't causing this to work as documented, and if there is additional info I can provide let me know. Hoping I just missed something simple.

Any help is appreciated.

Thanks