(#3228) Update Pester Tests to validate .Net

This updates the .Net version Pester test to use the 64 bit registry as
that is the one that Chocolatey CLI is using. Further, it updates the
.Net version to be a low integer instead of deleting it. It's been found
in some scenarios where the version is there but low .Net misbehaves. It
also adds a retry onto taking ownership of the registry key as we've
seen instances where it fails to take the ownership and so the test
fails. This retry should hopefully resolve these sporadic failures.

Author: corbob

tests/pester-tests/chocolatey.Tests.ps1

@@ -427,23 +427,31 @@ exit $error.count
     # This is skipped when not run in CI because it modifies the local system.
     Context '.Net Registry is not set' -Skip:(-not $env:TEST_KITCHEN) {
         BeforeAll {
-            $RegistryPath = 'SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v4\Full\'
-            Set-RegistryKeyOwner -Key $RegistryPath
+            $RegistryPath = 'SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\'
+
+            # Sometimes this is failing. This allows it to try a second time before completely failing.
+            try {
+                Set-RegistryKeyOwner -Key $RegistryPath
+            } catch {
+                Write-Warning "Failed to set the registry key ownership. Attempting again."
+                Set-RegistryKeyOwner -Key $RegistryPath
+            }
+
             $OriginalRelease = Get-ItemPropertyValue -Path "HKLM:\$RegistryPath" -Name Release
-            Remove-ItemProperty -Path "HKLM:\$RegistryPath" -Name Release
+            Set-ItemProperty -Path "HKLM:\$RegistryPath" -Name Release -Value 10
             $Output = Invoke-Choco help
         }
 
         AfterAll {
-            New-ItemProperty -Path "HKLM:\$RegistryPath" -Name Release -Value $OriginalRelease
+            Set-ItemProperty -Path "HKLM:\$RegistryPath" -Name Release -Value $OriginalRelease
         }
 
         It "Exits with Failure (1)" {
             $Output.ExitCode | Should -Be 1 -Because $Output.String
         }
 
         It "Reports .NET Framework 4.8 is required" {
-            $Output.Lines | Should -Contain '.NET 4.8 is not installed or may need a reboot to complete installation.'
+            $Output.Lines | Should -Contain '.NET 4.8 is not installed or may need a reboot to complete installation.' -Because $Output.String
         }
     }