Display shipment exceptions in admin area
Display shipment exceptions in admin area

When an exception occurs during createShipment(), Magento will display
mysterious "Cannot save track: Number can not be empty" error message to
admins.

This patch rethrows Pakettikauppa's error so that it's easier for shop owners
to figure out the issue and save their developer's precious work time.

Pakettikauppa/pakettikauppa-magento-2,Pakettikauppa/pakettikauppa-magento-2,Pakettikauppa/pakettikauppa-magento-2