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/cache/Adapter/MemcachedAdapter.php

@@ -0,0 +1,36 @@
+<?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\Cache\Adapter;
+
+use Symfony\Component\Cache\Traits\MemcachedTrait;
+
+class MemcachedAdapter extends AbstractAdapter
+{
+    use MemcachedTrait;
+
+    protected $maxIdLength = 250;
+
+    /**
+     * Using a MemcachedAdapter with a TagAwareAdapter for storing tags is discouraged.
+     * Using a RedisAdapter is recommended instead. If you cannot do otherwise, be aware that:
+     * - the Memcached::OPT_BINARY_PROTOCOL must be enabled
+     *   (that's the default when using MemcachedAdapter::createConnection());
+     * - tags eviction by Memcached's LRU algorithm will break by-tags invalidation;
+     *   your Memcached memory should be large enough to never trigger LRU.
+     *
+     * Using a MemcachedAdapter as a pure items store is fine.
+     */
+    public function __construct(\Memcached $client, $namespace = '', $defaultLifetime = 0)
+    {
+        $this->init($client, $namespace, $defaultLifetime);
+    }
+}