N°2435.1 Portal: Split portal composer.json in 2

- Autoloader for portal files in the itop-portal-base module
- Dependencies moved to root composer.json
- Add autoloader for /core and /application content

lib/symfony/config/Exception/FileLoaderImportCircularReferenceException.php

@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Exception;
+
+/**
+ * Exception class for when a circular reference is detected when importing resources.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class FileLoaderImportCircularReferenceException extends FileLoaderLoadException
+{
+    public function __construct(array $resources, $code = null, $previous = null)
+    {
+        $message = sprintf('Circular reference detected in "%s" ("%s" > "%s").', $this->varToString($resources[0]), implode('" > "', $resources), $resources[0]);
+
+        \Exception::__construct($message, $code, $previous);
+    }
+}