(HI-581) load hiera windows support before monkey patching ruby
(HI-581) load hiera windows support before monkey patching ruby

This works:

```ruby
require 'hiera/util/win32'
it do
  is_expected.to compile
end
```

This does not:

```ruby
it do
  require 'hiera/util/win32'
  is_expected.to compile
end
```

And produces the following error:

```
Failure/Error: require 'hiera/util/win32'

LoadError:
  cannot load such file -- fiddle/import
```

rodjek/rspec-puppet,puppetlabs/rspec-puppet,DavidS/rspec-puppet