Fix setData function calls due to dependencies

setData is expected to be called from various dependencies where addData is being used, so the original change has been reverted.

Author: igorwulff

lib/internal/Magento/Framework/DataObject.php

@@ -57,7 +57,7 @@ public function addData(array $arr)
         }
 
         foreach ($arr as $index => $value) {
-            $this->_data[$index] = $value;
+            $this->setData($index, $value);
         }
         return $this;
     }