xRDSessionDeployment and xRDRemoteApp: Adding tests and fixes for #39, #41

[danielboth]

Pull Request (PR) description This PR adds bugfixes and tests for the xRDSessionDeployment and xRDRemoteApp resources. It also adds the capability to xRDRemoteApp to uninstall RemoteApps after they have been deployed, this PR enables describing these as Absent.

This Pull Request (PR) fixes the following issues: xRDSessionDeployment Results in "You cannot call a method on a null-valued expression." Fixes #39 xRemoteApp: Ignores the CollectionName set by the user. Fixes #41

Task list:

• [X] Change details added to Unreleased section of README.md?
• [X] Added/updated descriptions in .schema.mof files where appropriate?
• [X] New/changed code adheres to Style Guidelines?
• [X] Unit and (optional) Integration tests created/updated where possible?

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This change is 

[codecov-io]

Codecov Report

Merging #42 into dev will increase coverage by 12.13%. The diff coverage is 100%.

@@             Coverage Diff             @@
##              dev      #42       +/-   ##
===========================================
+ Coverage   72.89%   85.03%   +12.13%     
===========================================
  Files           8        8               
  Lines         369      381       +12     
  Branches        9        9               
===========================================
+ Hits          269      324       +55     
+ Misses         91       48       -43     
  Partials        9        9

Impacted Files	Coverage Δ
...RDSessionDeployment/MSFT_xRDSessionDeployment.psm1	94.73% <100%> (+75.98%)	:arrow_up:
...Resources/MSFT_xRDRemoteApp/MSFT_xRDRemoteApp.psm1	97.77% <100%> (+86.66%)	:arrow_up:

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[danielboth]

Hi @ld0614, are you available to review this one?

[johlju]

Something strange is going on with Reviewable. Closing an reopening to see if it correct it self. The reviewable button pointed to ComputerManagementDsc for some reason.

[johlju]

@ld0614 since you are the maintainer for this repository, are you okay with this change?

[johlju]

Ah, I forgot that the change log get messed up when a release happened. Every time I miss this. 😄 The things that was under the unreleased section is merged onto the latest version instead. I will fix this.