xHyper-V: Update repository for continuous delivery

[johlju]

Pull Request (PR) description

Added

• xHyper-V
  • Added automatic release with a new CI pipeline.
  • Added stubs for the powershell module Hyper-V that are used for all unit tests.

Deprecated

• xHyper-V
  • The resource will not be tested for Windows Server 2008 R2 since that operating system has reach end-of-life.

Removed

• xVMSwitch
  • Removed the unit test that simulated functionality on Windows Server 2008 R2 since that operating system has reach end-of-life. No functionality was removed from the resource, but in a future release the resource might stop working for Windows Server 2008 R2.

Fixed

• xVMSwitch
  • Correctly return the state as $true or $false depending on the Ensure property when the switch does not exist.

This Pull Request (PR) fixes the following issues

• Fixes #182

Task list

• [x] Added an entry under the Unreleased section of the change log in the CHANGELOG.md. Entry should say what was changed, and how that affects users (if applicable).
• [x] Resource documentation added/updated in README.md.
• [x] Resource parameter descriptions added/updated in README.md, schema.mof and comment-based help.
• [ ] 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 Resource Testing Guidelines.
• [x] Integration tests added/updated (where possible). See DSC Resource Testing Guidelines.
• [x] New/changed code adheres to DSC Resource Style Guidelines and Best Practices.

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This change is 

[johlju]

@aromano2 and @mcollera I have updated the repository to the new CI pipeline so new releases can be done for this module. Please review this. There should be no breaking changes in this change. I had to make minor adjustment to logic, but that is mentioned in the CHANGELOG.md (and the PR description).

[johlju]

@mcollera Thank you very much! I will merge this as soon as @gaelcolas can help us add the needed variables to the pipeline. It can take a few days still.