minor #471 Reverted #467 to make PHP callbacks work again (javiereguiluz)

This PR was squashed before being merged into the master branch (closes #471).

Discussion
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Reverted #467 to make PHP callbacks work again

As explained by @stof in #467 (comment) this change was wrong.

Commits
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5f31a37 Reverted #467 to make PHP callbacks work again

Author: javiereguiluz

src/AppBundle/Command/AddUserCommand.php

@@ -224,7 +224,10 @@ protected function execute(InputInterface $input, OutputInterface $output)
         }
     }
 
-    private function passwordValidator($plainPassword)
+    /**
+     * @internal
+     */
+    public function passwordValidator($plainPassword)
     {
         if (empty($plainPassword)) {
             throw new \Exception('The password can not be empty.');
@@ -237,7 +240,10 @@ private function passwordValidator($plainPassword)
         return $plainPassword;
     }
 
-    private function emailValidator($email)
+    /**
+     * @internal
+     */
+    public function emailValidator($email)
     {
         if (empty($email)) {
             throw new \Exception('The email can not be empty.');
@@ -250,7 +256,10 @@ private function emailValidator($email)
         return $email;
     }
 
-    private function fullNameValidator($fullName)
+    /**
+     * @internal
+     */
+    public function fullNameValidator($fullName)
     {
         if (empty($fullName)) {
             throw new \Exception('The full name can not be empty.');