bug #350 make:entity "Self" or "Parent" (Adrien Laconi, weaverryan)

This PR was merged into the 1.0-dev branch.

Discussion
----------

make:entity "Self" or "Parent"

After using ``make:entity Self`` or ``make:entity Parent``, maker-bundle build 2 files :
```
 created: src/Entity/Self.php
 created: src/Repository/SelfRepository.php
```
But, after that :
```
Fatal error: Cannot use 'Self' as class name as it is reserved in /var/www/html/demo/src/Entity/Self.php on line 10
```
 ... and others "Call Stack" to finish with a "CRITICAL".

You must remove ``src/Entity/Self.php`` and ``src/Repository/SelfRepository.php`` to continue.

Commits
-------

f6a011c lowercasing special chars because we compare to a lowercase string
ec6ef77 Correction du problème lié à la création d'une classe "Self" ou "Parent" (make:entity), sinon une exception est levée APRES la création du fichier (Il faut forcément supprimer les fichiers générés).

Author: weaverryan

src/Validator.php

@@ -42,8 +42,8 @@ public static function validateClassName(string $className, string $errorMessage
             'static', 'switch', 'throw', 'trait', 'try', 'unset',
             'use', 'var', 'while', 'xor',
             'int', 'float', 'bool', 'string', 'true', 'false', 'null', 'void',
-            'iterable', 'object', '__FILE__', '__LINE__', '__DIR__', '__FUNCTION__', '__CLASS__',
-            '__METHOD__', '__NAMESPACE__', '__TRAIT__',
+            'iterable', 'object', '__file__', '__line__', '__dir__', '__function__', '__class__',
+            '__method__', '__namespace__', '__trait__', 'self', 'parent',
         ];
 
         foreach ($pieces as $piece) {