Update documentation for resource that uses RestoreFromRecycleBin

[johlju]

Pull Request (PR) description

• Changes to ADUser
  • Added a note to the resource README.md that RestoreFromRecycleBin
    needs the feature Recycle Bin enabled.
• Changes to ADGroup
  • Added a note to the resource README.md that RestoreFromRecycleBin
    needs the feature Recycle Bin enabled (issue ADGroup: Not restoring deleted object  #496).
• Changes to ADOrganizationalUnit
  • Added a note to the resource README.md that RestoreFromRecycleBin
    needs the feature Recycle Bin enabled.
• Changes to ADComputer
  • Added a note to the resource README.md that RestoreFromRecycleBin
    needs the feature Recycle Bin enabled (issue ADComputer: Not restoring deleted object #498).
  • Updated integration test to be able to catch when a computer account
    cannot be restored.

This Pull Request (PR) fixes the following issues

• Fixes ADGroup: Not restoring deleted object  #496
• Fixes ADComputer: Not restoring deleted object #498

Task list

• Added an entry under the Unreleased section in the CHANGELOG.md.
  Entry should say what was changed, and how that affects users (if applicable).
• Resource documentation added/updated in resource directory README.md.
• Resource parameter descriptions added/updated in schema.mof
  and comment-based help.
• Comment-based help added/updated.
• Conceptual help topic added/updated (cultureFolder\about_ResourceName.help.txt).
• Localization strings added/updated in all localization files as appropriate.
• Examples appropriately added/updated.
• Unit tests added/updated. See DSC Resource Testing Guidelines.
• Integration tests added/updated (where possible). See DSC Resource Testing Guidelines.
• New/changed code adheres to DSC Resource Style Guidelines and Best Practices.

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This change is 

[johlju]

Reviewed 9 of 9 files at r1, 4 of 4 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved

[codecov-io]

Codecov Report

Merging #499 into dev will not change coverage.
The diff coverage is n/a.

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