Fix nxService unknown propertyName error

[gurrajatwal]

Pull Request (PR) description

Fixed a bug in nxService where the Get-GuestConfigurationPackageComplianceStatus cmdlet from the GuestConfiguration module was throwing an unknown propertyName error. The GC agent was throwing this error because Get() was returning an object with more properties than what is defined in the nxService class.

This Pull Request (PR) fixes the following issues

• Fixes #25

Task list

• [x] Added an entry to the change log under the Unreleased section of the file CHANGELOG.md. Entry should say what was changed and how that affects users (if applicable), and reference the issue being resolved (if applicable).
• [x] Resource documentation added/updated in README.md.
• [x] Comment-based help added/updated.
• [x] Localization strings added/updated in all localization files as appropriate.
• [x] Examples appropriately added/updated.
• [x] Unit tests added/updated. See DSC Community Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
• [x] New/changed code adheres to DSC Community Style Guidelines.