Allow the gem source to be configured for air gapped environments.

[16c7x]

Use Case

The installation of the toml-rb will fail for people in an airgapped environment.

Describe the Solution You Would Like

In profile/toml.pp change

  package { 'toml-rb':
    ensure   => $version,
    provider => 'puppetserver_gem',
    notify   => Service[$service_name],
  }

to

  package { 'toml-rb':
    ensure   => $version,
    provider => 'puppetserver_gem',
    notify     => Service[$service_name],
    source   => $source,
  }

A default source would need to be setup

Describe Alternatives You've Considered

There isn't an alternative if the machine cannot get out to the default source.

Additional Context

Add any other context or screenshots about the feature request here.