SLIAC, Slovakia (Reuters) – Germany will deliver seven self-propelled howitzers to Ukraine, Defence Minister Christine Lambrecht said on Friday, in a further reversal of a longtime policy not to send heavy weapons to war zones due to the country’s Nazi past. The howitzer delivery, on top of five such artillery systems the Netherlands had already pledged, was another sign of Berlin heeding pressure at home and abroad for it to help Ukraine fend off a Russian invasion. The heavy weapons will come out of Bundeswehr inventories and be delivered as soon as they emerge from maintenance over the next…