Change PlaceOrderCommand/OrderPlacedEvent to
CreateOrderCommand/OrderCreatedEvent. Placed suggests it is already
placed, meaning products cannot be changed. However with the new
OrderLine member and its operations it's no longer correct to state the
order placed upon creation. Furthermore, the OrderedProduct is no longer
a single product, but contains several. Renaming this to Order is more
in line with what this query model resembles
#BAEL-4767
213f6f0f8b