Some Windows provisioning scripts use the Invoke-WebRequest without
setting the ProgressPreference = 'SilentlyContinue' variable for
disabling the download progress bar. Disabling the progress bar
greatly increases the download speed during provisioning.
Change-Id: I649c1bcc970577776d720a4ebf5a7af96c1603f8
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>