bug symfony#17057 [FrameworkBundle][HttpKernel] the finder is required to discover bundle commands (xabbuh)

This PR was squashed before being merged into the 2.3 branch (closes symfony#17057).

Discussion
----------

[FrameworkBundle][HttpKernel] the finder is required to discover bundle commands

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#17038
| License       | MIT
| Doc PR        |

Commits
-------

17fcef5 [FrameworkBundle][HttpKernel] the finder is required to discover bundle commands

Author: nicolas-grekas

src/Symfony/Bundle/FrameworkBundle/composer.json

@@ -20,6 +20,7 @@
         "symfony/dependency-injection": "~2.3",
         "symfony/config": "~2.3,>=2.3.12",
         "symfony/event-dispatcher": "~2.1",
+        "symfony/finder": "~2.0,>=2.0.5",
         "symfony/http-foundation": "~2.3,>=2.3.19",
         "symfony/http-kernel": "~2.3,>=2.3.22",
         "symfony/filesystem": "~2.3",
@@ -34,7 +35,6 @@
         "symfony/console": "~2.3",
         "symfony/css-selector": "~2.0,>=2.0.5",
         "symfony/dom-crawler": "~2.0,>=2.0.5",
-        "symfony/finder": "~2.0,>=2.0.5",
         "symfony/intl": "~2.3",
         "symfony/security": "~2.3",
         "symfony/form": "~2.3.31",
@@ -45,7 +45,6 @@
     },
     "suggest": {
         "symfony/console": "For using the console commands",
-        "symfony/finder": "For using the translation loader and cache warmer",
         "symfony/form": "For using forms",
         "symfony/validator": "For using validation",
         "symfony/serializer": "For using the serializer service",

src/Symfony/Component/HttpKernel/Bundle/Bundle.php

@@ -170,6 +170,10 @@ public function registerCommands(Application $application)
             return;
         }
 
+        if (!class_exists('Symfony\Component\Finder\Finder')) {
+            throw new \RuntimeException('You need the symfony/finder component to register bundle commands.');
+        }
+
         $finder = new Finder();
         $finder->files()->name('*Command.php')->in($dir);