Merge remote-tracking branch 'origin/MAGETWO-37848-prefix-length' into develop

Author: Joan He

lib/internal/Magento/Framework/DB/Test/Unit/ExpressionConverterTest.php

@@ -39,9 +39,9 @@ public function shortenEntityNameDataProvider()
                 'pre_'
             ],
             'Abbreviated identifier' => [
-                $length40 . 'enterprise_notification_index',
+                $length40 . 'downloadable_notification_index',
                 'pre_',
-                $length40 . 'ent_ntfc_idx'
+                $length40 . 'dl_ntfc_idx'
             ],
         ];
     }