(GH-741) Ensure CultureInfo with PowerShell Host

When using the built-in posh host, the culture information that is
returned should be the user's culture info, so that gathering the LCID
for language settings in packages works appropriately. Without this
fix, everyone will be given the invariant culture (127), which could
cause problems across every package that detects locale.

src/chocolatey.resources/helpers/chocolateyScriptRunner.ps1

@@ -58,5 +58,4 @@ if ($env:ChocolateyExitCode -ne $null -and $env:ChocolateyExitCode -ne '') {
  $exitCode = $env:ChocolateyExitCode
 }
 
-
 Exit $exitCode

src/chocolatey/infrastructure/powershell/PoshHost.cs

@@ -26,6 +26,8 @@ public class PoshHost : PSHost
         private readonly ChocolateyConfiguration _configuration;
         private readonly Guid _hostId = Guid.NewGuid();
         private readonly PoshHostUserInterface _psUI;
+        private readonly CultureInfo _cultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture;
+        private readonly CultureInfo _cultureUiInfo = System.Threading.Thread.CurrentThread.CurrentUICulture;
 
         private bool _isClosing;
 
@@ -60,12 +62,12 @@ public override void SetShouldExit(int exitCode)
 
         public override CultureInfo CurrentCulture
         {
-            get { return CultureInfo.InvariantCulture; }
+            get { return _cultureInfo; }
         }
 
         public override CultureInfo CurrentUICulture
         {
-            get { return CultureInfo.InvariantCulture; }
+            get { return _cultureUiInfo; }
         }
 
         public override Guid InstanceId