Fix undefined method `to_cf_host' for Chef::Resource::MacosUserDefaults error

[rishichawda]

Description

userdefaults run fails because to_cf_host could not be found when placed inside action_class. removed the action_class block and moved the import to top of the file. this seems to have fixed the issue.

Related Issue

https://github.com/chef/desktop-config/issues/449

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (non-breaking change that does not add functionality or fix an issue)

Checklist:

• I have read the CONTRIBUTING document.
• I have run the pre-merge tests locally and they pass.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commits have been signed-off for the Developer Certificate of Origin.