add file to user appdata to make sure they get message only once

Author: azdevxps

tools/UpdateModules.ps1

@@ -69,12 +69,16 @@ function Create-ModulePsm1
 
      if ($ModulePath -like "*Profile*")
      {
-         Write-Host "here"
-        $template = $template -replace "%PSVersionDeprecationMessage%", "Write-Warning `"PowerShell version 3 and 4 will no longer be supported starting in May 2018. Please update to the latest version of PowerShell 5.1`""
+        $SpecialFolderPath = [Environment]::GetFolderPath("ApplicationData")
+        $WarningMessage = "`"PowerShell version 3 and 4 will no longer be supported starting in May 2018. Please update to the latest version of PowerShell 5.1`""
+        $template = $template -replace "%PSVersionDeprecationMessage%", 
+            "if (!(Test-Path '$SpecialFolderPath\Windows Azure Powershell\PSDeprecationWarning.txt')) { `
+                Write-Warning $WarningMessage `
+                $WarningMessage | Out-File -FilePath '$SpecialFolderPath\Windows Azure Powershell\PSDeprecationWarning.txt' `
+            }"
      }
      else
      {
-        Write-Host "here1"
          $template = $template -replace "%PSVersionDeprecationMessage%", ""
      }