Add missing type preference for sample data command

Author: schmengler

app/code/Magento/SampleData/etc/di.xml

@@ -15,5 +15,10 @@
             </argument>
         </arguments>
     </type>
-    <preference for="Magento\Framework\Filesystem\Directory\ReadInterface" type="Magento\Framework\Filesystem\Directory\Read" />
+    <virtualType name="Magento\SampleData\Filesystem\Directory\Read" type="Magento\Framework\Filesystem\Directory\Read">
+        <arguments>
+            <argument name="driver" xsi:type="object">Magento\Framework\Filesystem\Driver\File</argument>
+        </arguments>
+    </virtualType>
+    <preference for="Magento\Framework\Filesystem\Directory\ReadInterface" type="Magento\SampleData\Filesystem\Directory\Read" />
 </config>