change registration resource location to global from westcentralus

Registration/RegisterWithAzure.psm1

@@ -629,7 +629,7 @@ function RegistrationWorker{
         Log-Output "Creating registration resource '$RegistrationName'."
         $resourceCreationParams = @{
             ResourceGroupName = $ResourceGroupName
-            Location          = $ResourceGroupLocation
+            Location          = 'Global'
             ResourceName      = $RegistrationName
             ResourceType      = "Microsoft.AzureStack/registrations"
             ApiVersion        = "2017-06-01"