title: Magento 2 does not import configurable products
body: <p>When I create a <strong>configurable</strong> product through <code>Products &gt; Catalog &gt; Add Product</code>, everything works well. During the process of creating this product I add 3 configurations.</p>
  
  <p>The product is visible in the front-end and there are 3 options available. However, when I do an export, delete all products and re-import my products; the products are imported, but the configurable product does not have any visible relation with the virtual products. Also, the product is not visible in the front-end (store).</p>
  
  <p>The import file can be viewed in <a href="https://pastebin.com/E62iwfDr" rel="nofollow noreferrer">this PasteBin</a>.</p>