bug #79 Fix undefined class GuardAuthenticator (ChiarilloMassimo)

This PR was merged into the 1.0-dev branch.

Discussion
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Fix undefined class GuardAuthenticator

Class `Symfony\Component\Security\Guard\GuardAuthenticator;` does not exist.

# How to test

- [ ] `./bin/console make:auth`
- [ ]  Open your `Authenticator`

Commits
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25661b9 Fix undefined class GuardAuthenticator

src/Resources/skeleton/authenticator/Empty.tpl.php

@@ -7,9 +7,9 @@
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Security\Core\User\UserProviderInterface;
-use Symfony\Component\Security\Guard\GuardAuthenticator;
+use Symfony\Component\Security\Guard\AbstractGuardAuthenticator;
 
-class <?= $class_name ?> extends GuardAuthenticator
+class <?= $class_name ?> extends AbstractGuardAuthenticator
 {
     public function supports(Request $request)
     {