2020-09-16-added-sold-quantity-metric.md

title	issue	author	author_email	author_github
Added sold quantity metric	NEXT-10765	Lennart Tinkloh	[email protected]	lernhart

Core

• Added Shopware\Core\Migration\Migration1600156989AddProductSalesField to add sales field to product table
• Added new write protected int field sales to Shopware\Core\Content\Product\ProductDefinition
• Added new property sales and corresponding getter / setter in Shopware/Core/Content/Product/ProductEntity
• Changed Shopware/Core/Content/Product/DataAbstractionLayer/StockUpdater to additionally update sold quantity of products

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