Keywords check - ignore DSC keywords

[SSvilen]

Pull Request (PR) description

As discussed we need to remove the checks for all DSC Keywords. This PR will remove the checks for the Configuration keyword, as well as for all dynamic keywords (line Node and resource names).

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 CHANGELOG.md. Entry should say what was changed, and how that affects users (if applicable).
• [ ] Documentation added/updated in README.md.
• [ ] Comment-based help added/updated for all new/changed functions.
• [ ] Localization strings added/updated in all localization files as appropriate.
• [x] Unit tests added/updated.
• [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 #352 into dev will increase coverage by <1%. The diff coverage is 100%.

@@         Coverage Diff          @@
##            dev   #352    +/-   ##
====================================
+ Coverage    80%    80%   +<1%     
====================================
  Files        12     12            
  Lines      1805   1806     +1     
  Branches      2      2            
====================================
+ Hits       1447   1448     +1     
  Misses      356    356            
  Partials      2      2