xRDCertificateConfiguration: Prevents 'Get-RDServer'' not recognized error

[uw-dc]

Pull Request (PR) description

Fixes an issue that occurs in some circumstances:
'The term 'Get-RDServer' is not recognized as the name of a cmdlet'

This Pull Request (PR) fixes the following issues

• Fixes xRDCertificateConfiguration:The term ''Get-RDServer'' is not recognized #79

Task list

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

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This change is 

[uw-dc]

##[warning]An image label with the label ubuntu 16.04 does not exist.

[uw-dc]

GitVersion action is deprecated ... should be using GitTools instead?

GitTools/GitVersion#3073

[johlju]

We are changing to installing GitVersion with dotnet instead: https://github.com/gaelcolas/Sampler/blob/dade014db4c6109ca64f249497a3dcf0a9504283/azure-pipelines.yml#L28-L45

But your change seems to work, so we leave it as that. Another PR can change all pipeline files to the latest (from the Sampler templates).

Reviewed 2 of 2 files at r1, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @uw-dc)

[johlju]

The deploy fails since this repo is too far behind the current pipeline templates. I can look into it tomorrow.