MAGETWO-95645: Custom file attribute works incorrect

- fix tests

Author: omiroshnichenko

app/code/Magento/Eav/Model/Attribute/Data/File.php

@@ -120,8 +120,7 @@ public function extractValue(RequestInterface $request)
     }
 
     /**
-     * Validate file by attribute validate rules
-     * Return array of errors
+     * Validate file by attribute validate rules and return array of errors
      *
      * @param array $value
      * @return string[]
@@ -180,7 +179,8 @@ public function validateValue($value)
             $dir = $this->_directory->getAbsolutePath($this->getAttribute()->getEntityType()->getEntityTypeCode());
             $fileData = [
                 'size' => filesize($dir . $value),
-                'name' => $value
+                'name' => $value,
+                'tmp_name' => $dir . $value
             ];
         }
 

lib/internal/Magento/Framework/Data/Form/Element/Text.php

@@ -4,15 +4,13 @@
  * See COPYING.txt for license details.
  */
 
-/**
- * Form text element
- *
- * @author      Magento Core Team <core@magentocommerce.com>
- */
 namespace Magento\Framework\Data\Form\Element;
 
 use Magento\Framework\Escaper;
 
+/**
+ * Form text element
+ */
 class Text extends AbstractElement
 {
     /**