Add class specs for govuk_ghe_vpn
user
```ruby
require_relative '../../../../spec_helper'

describe 'govuk_ghe_vpn', :type => :class do

  it { is_expected.to compile }
  it { is_expected.to compile.with_all_deps }
  it { is_expected.to contain_class('govuk_ghe_vpn') }

end
```
assistant