MAGETWO-91796: Implement Downloadable Price indexer

Author: duhon

app/code/Magento/Downloadable/Model/ResourceModel/Indexer/Price.php

@@ -21,7 +21,8 @@
 use Magento\Customer\Model\Indexer\CustomerGroupDimensionProvider;
 
 /**
- * Configurable Products Price Indexer Resource model
+ * Downloadable Product Price Indexer Resource model
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class Price implements DimensionalIndexerInterface
 {
@@ -100,6 +101,7 @@ public function __construct(
         $this->indexTableStructureFactory = $indexTableStructureFactory;
         $this->tableMaintainer = $tableMaintainer;
         $this->productType = $productType;
+        $this->connectionName = $connectionName;
         $this->priceModifiers = $priceModifiers;
         $this->metadataPool = $metadataPool;
         $this->resource = $resource;