Fixed bug with FQDNs in OWA Machine resource

[BrianFarnhill]

Currently if a machine join is specified with a fully qualified name it will fail the test method. Added logic to account for FQDNs here to remove the incorrect false results.

• [X] Change details added to Unreleased section of changelog.md?
• [X] Added/updated documentation and descriptions in .schema.mof files where appropriate?
• [X] Examples appropriately updated?
• [X] New/changed code adheres to [Style Guidelines]?(https://github.com/PowerShell/DscResources/blob/master/StyleGuidelines.md)?
• [X] Unit and Integration tests created/updated where possible?

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This change is

[BrianFarnhill]

@kwirkykat Can you please check the webhooks in this repo for AppVeyor - doesn't look like it is automatically running the tests now that it's been moved over.

[kwirkykat]

@BrianFarnhill Updated WebHooks and started an AppVeyor build for this repo. I'm not sure that the PR will auto update though?

[BrianFarnhill]

@kwirkykat I'll push a dummy commit in to trigger a fresh one. Thanks!