Remove unnecessary -ListAvailable which triggers a Warning in Offline Environments and wastes time.

[ChristophHannappel]

Removed unnecessary -ListAvailable

Pull Request

Pull Request (PR) description

Resolve-Dependency.ps1 uses the following Line to determine if the nuget Package Provider is installed:

# Install the package provider if it is not available.
$nuGetProvider = Get-PackageProvider -Name 'NuGet' -ListAvailable | Select-Object -First 1

Using -ListAvailable triggers a webrequest which displays the available providers with this Name.

• The result ist not limited to the installed ones.
• It'll generate a warning on offline Buildservers, which can be missleading.
• The request slows down the command by 3 seconds.

  
  PS > Measure-Command {Get-PackageProvider -Name nuget -ListAvailable}
  Days              : 0
  Hours             : 0
  Minutes           : 0
  Seconds           : 3
  Milliseconds      : 128
  Ticks             : 31286760
  TotalDays         : 3,62115277777778E-05
  TotalHours        : 0,000869076666666667
  TotalMinutes      : 0,0521446
  TotalSeconds      : 3,128676
  TotalMilliseconds : 3128,676

PS > Measure-Command {Get-PackageProvider -Name nuget} Days : 0 Hours : 0 Minutes : 0 Seconds : 0 Milliseconds : 13 Ticks : 136945 TotalDays : 1,58501157407407E-07 TotalHours : 3,80402777777778E-06 TotalMinutes : 0,000228241666666667 TotalSeconds : 0,0136945 TotalMilliseconds : 13,6945

### Fixed
Removed a `-ListAvailable` from the `Get-PackageProvider` at `Resolve-Dependency.ps1` which could lead to false positives, creates a warning in offline Build Servers and slows down the process.

## Task list

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- [X] The PR represents a single logical change. i.e. Cosmetic updates should go in different PRs.
- [ ] Added an entry under the Unreleased section of in the CHANGELOG.md as per [format](https://keepachangelog.com/en/1.0.0/).
- [X] Local clean build passes without issue or fail tests (`build.ps1 -ResolveDependency`).
- [ ] Resource documentation added/updated in README.md.
- [ ] Resource parameter descriptions added/updated in README.md, schema.mof
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- [ ] 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](https://github.com/PowerShell/DscResources/blob/master/TestsGuidelines.md).
- [ ] Integration tests added/updated (where possible). See [DSC Resource Testing Guidelines](https://github.com/PowerShell/DscResources/blob/master/TestsGuidelines.md).
- [X] New/changed code adheres to [DSC Resource Style Guidelines](https://github.com/PowerShell/DscResources/blob/master/StyleGuidelines.md) and [Best Practices](https://github.com/PowerShell/DscResources/blob/master/BestPractices.md).

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