C: added to Puppet config setting path

[jfridgen]

We're running rspec-puppet v2.7.2 via the Puppet PDK v1.9.0.0 and are running into an issue testing the following resource while running on Windows but pretending to be on Linux.

Puppet Resource Snippet:

$config = $settings::config

ini_setting { 'use_cached_catalog':
  ensure  => present,
  path    => $config,
  section => 'agent',
  setting => 'use_cached_catalog',
  value   => $use_cached_catalog,
}

Error:

Ini_setting[use_cached_catalog]: File paths must be fully qualified, not
        'c:/nul/puppet.conf'

We tried overriding the config in spec_helper.rb as follows:

RSpec.configure do |c|
  c.config = '/dummy'
end

But we received a similar error showing that C: is being prepended:

Ini_setting[use_cached_catalog]: File paths must be fully qualified, not
        'C:/dummy'

When we set the path in the ini_setting resource explicitly to /dummy, it works fine, so it seems like an issue prepending C: to the config Puppet setting.

Let me know if I can provide any additional information to help.