RegistryPolicyFile: resolve issue #34 valuetype case mismatch in resource parser vs schema

[chambersmp]

Pull Request (PR) description

Resolve issue with GetRegTypeString() method returning unsupported values:
'DWord'
'QWord'

The resource schema file defines the expected values should be:
'Dword'
'Qword'

This Pull Request (PR) fixes the following issues

• Fixes RegistryPolicyFile: registrypolicyfile parser returns unsupported valueType for dword and qword resources #34

Task list

• Added an entry to the change log under the Unreleased section of the
  file CHANGELOG.md. Entry should say what was changed and how that
  affects users (if applicable), and reference the issue being resolved
  (if applicable).
• 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 Community Testing Guidelines.
• 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 

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 93%. Comparing base (db252f6) to head (1cc0e13).

Files with missing lines	Patch %	Lines
...ryPolicyFileParser/GPRegistryPolicyFileParser.psm1	50%	1 Missing ⚠️

Additional details and impacted files

@@         Coverage Diff          @@
##           master   #35   +/-   ##
====================================
  Coverage      93%   93%           
====================================
  Files           3     3           
  Lines         357   357           
====================================
  Hits          334   334           
  Misses         23    23           

Files with missing lines	Coverage Δ
...ryPolicyFileParser/GPRegistryPolicyFileParser.psm1	88% <50%> (ø)

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[johlju]

I think this should be resolved like I mentioned in the #34 (comment). What do you think?