Custom module to add Distribution Point groups

[jeffotterpohl]

Pull Request (PR) description

Custom module to add distribution point groups to configuration manager. The resource will also be able to add distribution points match, include, exclude to the a new\already created distribution point group.

This Pull Request (PR) fixes the following issues

Task list

• [X] 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).
• [X] Resource documentation added/updated in README.md.
• [X] Resource parameter descriptions added/updated in README.md, schema.mof and comment-based help.
• [X] Comment-based help added/updated.
• [X] Localization strings added/updated in all localization files as appropriate.
• [X] Examples appropriately added/updated.
• [X] Unit tests added/updated. See DSC Community Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
• [X] New/changed code adheres to DSC Community Style Guidelines.

---

This change is 

[codecov[bot]]

Codecov Report

Merging #50 into master will increase coverage by 0%. The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #50   +/-   ##
=====================================
  Coverage      96%    96%           
=====================================
  Files          25     26    +1     
  Lines        2534   2632   +98     
=====================================
+ Hits         2446   2544   +98     
  Misses         88     88           

[NEllis280]

Tested this, with latest updates in the lab and everything works as intended.