Allow create or not ACR when creating k8s

k8s/gen-k8s-env.ps1

@@ -3,16 +3,19 @@
     [parameter(Mandatory=$true)][string]$location,
     [parameter(Mandatory=$true)][string]$registryName,
     [parameter(Mandatory=$true)][string]$orchestratorName,
-    [parameter(Mandatory=$true)][string]$dnsName
+    [parameter(Mandatory=$true)][string]$dnsName,
+    [parameter(Mandatory=$true)][string]$createAcr=$true
 )
 
 # Create resource group
 Write-Host "Creating resource group..." -ForegroundColor Yellow
 az group create --name=$resourceGroupName --location=$location
 
-# Create Azure Container Registry
-Write-Host "Creating Azure Container Registry..." -ForegroundColor Yellow
-az acr create -n $registryName -g $resourceGroupName -l $location  --admin-enabled true --sku Basic
+if ($createAcr) {
+    # Create Azure Container Registry
+    Write-Host "Creating Azure Container Registry..." -ForegroundColor Yellow
+    az acr create -n $registryName -g $resourceGroupName -l $location  --admin-enabled true --sku Basic
+}
 
 # Create kubernetes orchestrator
 Write-Host "Creating kubernetes orchestrator..." -ForegroundColor Yellow