MAGETWO-52535: [FT] CreateProductAttributeEntityTest fails because product cannot be searched by attribute on Storefront

Author: Valeriy Nayda

lib/internal/Magento/Framework/Search/Request/Binder.php

@@ -73,7 +73,7 @@ private function processData($data, $bindData)
         array_walk_recursive($bindData, function (&$item) {
             $item = trim($item);
         });
-        $bindData = array_filter($bindData);
+        $bindData = array_filter($bindData, 'strlen');
         foreach ($data as $key => $value) {
             if (is_array($value)) {
                 $data[$key] = $this->processData($value, $bindData);