Project table prefix not taken into account

[julien101]

Following the basic installation process, my attachments table does not contain the project prefix specified in my main.php:
'tablePrefix' => 'abc_',
The fix is probably simple:

1. Modify File.php:
   public static function tableName()
   {
   return '{{%attach_file}}';
   }
2. Fix m150127_040544_add_attachments up() and down() to support tablePrefix

[CTOlet]

On my project according to the my architecture it must be without table prefix. If you need the table prefix you can fork and do that by yourself