minor symfony#8987 Fix YAML config bug (Holicz, javiereguiluz)

This PR was merged into the 3.4 branch.

Discussion
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Fix YAML config bug

Should be merged into all version branches

Commits
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ee96ffa Fixed the XML and PHP config instead of the YAML config
876d572 Fix YAML config bug

Author: javiereguiluz

event_dispatcher.rst

@@ -91,9 +91,7 @@ using a special "tag":
                 http://symfony.com/schema/dic/services/services-1.0.xsd">
 
             <services>
-                <service id="app.exception_listener"
-                    class="AppBundle\EventListener\ExceptionListener">
-
+                <service id="AppBundle\EventListener\ExceptionListener">
                     <tag name="kernel.event_listener" event="kernel.exception" />
                 </service>
             </services>
@@ -105,7 +103,7 @@ using a special "tag":
         use AppBundle\EventListener\ExceptionListener;
 
         $container
-            ->register('app.exception_listener', ExceptionListener::class)
+            ->autowire(ExceptionListener::class)
             ->addTag('kernel.event_listener', array('event' => 'kernel.exception'))
         ;