Safely handle a missing root user

[ekohl]

In 657cd71 it was assumed that Etc would never be available on Windows and that the LoadError would catch it. Turns out that was an invalid assumption. This uses the safe operator to gracefully handle it.

Fixes #1293

[hboetes]

I am hboetes and I approve of this PR. 🤓

PS C:\Users\h.boetes> puppet agent -t
Info: Using environment 'production'
Info: Retrieving pluginfacts
Info: Retrieving plugin
Info: Loading facts
Error: Facter: Error while resolving custom fact fact='root_home', resolution='<anonymous>': undefined method `dir' for nil:NilClass
Info: Caching catalog for silverbox.example.com
Info: Applying configuration version '1676531979'
Error: /Stage[main]/Chocolatey::Install/Exec[install_chocolatey_official]: Provider powershell is not functional on this host
Error: /Stage[main]/Windows_base/Exec[Disable HideFileExt]: Provider powershell is not functional on this host
Error: /Stage[main]/Heliumv::Windows/Windows::Shortcut[C:/users/public/desktop/HeliumVClient-Nov2022.lnk]/Exec[windows-shortcut-C:/users/public/desktop/HeliumVClient-Nov2022.lnk]: Provider powershell is not functional on this host
Notice: Applied catalog in 23.16 seconds
PS C:\Users\h.boetes> puppet agent -t
Info: Using environment 'production'
Info: Retrieving pluginfacts
Info: Retrieving plugin
Notice: /File[C:/ProgramData/PuppetLabs/puppet/cache/lib/facter/root_home.rb]/content:

Notice: /File[C:/ProgramData/PuppetLabs/puppet/cache/lib/facter/root_home.rb]/content: content changed '{sha256}adb8bc86bbae05b0fcf1cd1dff680eade4b29876f8133311f0af02364a0270c4' to '{sha256}f07c76ca898e90bdb32b744c8639eceb96a06b2292c1e08c4827f96af1ca0d79'
Info: Loading facts
Info: Caching catalog for silverbox.example.com
Info: Applying configuration version '1676532192'
Error: /Stage[main]/Chocolatey::Install/Exec[install_chocolatey_official]: Provider powershell is not functional on this host
Error: /Stage[main]/Windows_base/Exec[Disable HideFileExt]: Provider powershell is not functional on this host
Error: /Stage[main]/Heliumv::Windows/Windows::Shortcut[C:/users/public/desktop/HeliumVClient-Nov2022.lnk]/Exec[windows-shortcut-C:/users/public/desktop/HeliumVClient-Nov2022.lnk]: Provider powershell is not functional on this host
Notice: Applied catalog in 21.54 seconds

[hboetes]

Thanks for the instructions, I have approved the change.

[LukasAud]

LGTM

[LukasAud]

Thanks for your contribution!