Updated tests to meet Pester V4 guidelines - Fixes #53

[PlagueHO]

Pull Request (PR) description
This PR updates the tests to meet Pester V4 guidelines.

This Pull Request (PR) fixes the following issues:

• Fixes Migrate Pester Test Syntax from v3 -> v4 #53

Task list:

• Change details added to Unreleased section of CHANGELOG.md?
• Added/updated documentation, comment-based help and descriptions in .schema.mof files where appropriate?
• Examples appropriately updated?
• New/changed code adheres to Style Guidelines?
• Unit and (optional) Integration tests created/updated where possible?

@johlju - would you mind reviewing? I am hoping this is trivial as it is just a Pester V3 -> V4 conversion. But no rush at all. As always I'm eternally grateful for all your help on these resources (seriously, I don't know how I'd get changes through without you).

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This change is 

[PlagueHO]

@johlju - I could have converted all the It 'should to It 'Should (capital S for should) but there were so many that I didn't want to make the diff that large. Happy to do it though if you want (as it is just a simple search/replace).

[codecov-io]

Codecov Report

Merging #56 into dev will not change coverage.
The diff coverage is n/a.

@@         Coverage Diff         @@
##            dev    #56   +/-   ##
===================================
  Coverage    96%    96%           
===================================
  Files         7      7           
  Lines      1020   1020           
===================================
  Hits        985    985           
  Misses       35     35

[johlju]

It’s okay by me if you want to do it. Will try to review the pending PRs tomorrow.

[PlagueHO]

Thanks @johlju - I did it to get it out of the way. Thanks again!

[johlju]

Reviewed 2 of 16 files at r1, 14 of 14 files at r2.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

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Tests/Unit/MSFT_xDFSNamespaceFolder.Tests.ps1, line 221 at r2 (raw file):

-Exactly 1

These should be -Exactly -Times 1. Throughout.

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Comments from Reviewable

[PlagueHO]

Review status: 9 of 16 files reviewed at latest revision, 1 unresolved discussion.

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Tests/Unit/MSFT_xDFSNamespaceFolder.Tests.ps1, line 221 at r2 (raw file):

Previously, johlju (Johan Ljunggren) wrote…

-Exactly 1

These should be -Exactly -Times 1. Throughout.

Done.

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Comments from Reviewable

[johlju]

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Reviewed 7 of 7 files at r3.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable