SecurityPolicyDsc: OptIn to DSC Resource Meta Tests

[X-Guardian]

Pull Request (PR) description

This PR opts in to the following DSC Resource meta tests:

• Common Tests - Validate Module Files
• Common Tests - Validate Script Files
• Common Tests - Validate Markdown Files
• Common Tests - Required Script Analyzer Rules
• Common Tests - Flagged Script Analyzer Rules
• Common Tests - New Error-Level Script Analyzer Rules
• Common Tests - Custom Script Analyzer Rules
• Common Tests - Validate Markdown Links
• Common Tests - Relative Path Length

To pass the Common Tests - Validate Script Files test, the following files have had their BOM removed:

• Examples/Resources/AccountPolicy/AccountPolicy_Config.ps1
• Tests/Integration/MSFT_SecurityTemplate.Integration.tests.ps1
• Tests/Integration/MSFT_SecurityTemplate.config.ps1

To pass the Common Tests - Validate Script Files, a Write-Verbose command was added to the Get-TargetResource function of the SecurityTemplate resource.

To pass the Common Tests - Validate Markdown Files test, markdown issues were fixed in the README.md file.

This Pull Request (PR) fixes the following issues

None

Task list

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

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This change is 

[codecov-io]

Codecov Report

Merging #130 into dev will increase coverage by <1%. The diff coverage is 100%.

@@         Coverage Diff         @@
##           dev   #130    +/-   ##
===================================
+ Coverage   89%    89%   +<1%     
===================================
  Files        5      5            
  Lines      497    498     +1     
===================================
+ Hits       446    447     +1     
  Misses      51     51

[X-Guardian]

Would someone please review this PR? Thanks.

[johlju]

@jcwalker Do you have time to review this?

[X-Guardian]

I've resolved the conflicts on this PR so it is now ready for review.