[SecurityBundle] disable the init:acl command if ACL is not used

src/Symfony/Bundle/SecurityBundle/Command/InitAclCommand.php

@@ -23,6 +23,18 @@ use Doctrine\DBAL\Schema\SchemaException;
  */
 class InitAclCommand extends ContainerAwareCommand
 {
+    /**
+     * {@inheritdoc}
+     */
+    public function isEnabled()
+    {
+        if (!$this->getContainer()->has('security.acl.dbal.connection')) {
+            return false;
+        }
+
+        return parent::isEnabled();
+    }
+
     /**
      * {@inheritdoc}
      */