Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/symfony/routing/RouterInterface.php

@@ -1,35 +0,0 @@
-<?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\Routing;
-
-use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
-use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
-
-/**
- * RouterInterface is the interface that all Router classes must implement.
- *
- * This interface is the concatenation of UrlMatcherInterface and UrlGeneratorInterface.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- */
-interface RouterInterface extends UrlMatcherInterface, UrlGeneratorInterface
-{
-    /**
-     * Gets the RouteCollection instance associated with this Router.
-     *
-     * WARNING: This method should never be used at runtime as it is SLOW.
-     *          You might use it in a cache warmer though.
-     *
-     * @return RouteCollection
-     */
-    public function getRouteCollection();
-}