bug symfony#12182 [FrameworkBundle] register TranslatorListener service (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
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[FrameworkBundle] register `TranslatorListener` service

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#12167
| License       | MIT
| Doc PR        |

Since the `TranslatorListener` was not registered as a service, the
proper locale would never have been passed from the current request
to the translator.

Commits
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3b578a6 register `TranslatorListener` service

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/Resources/config/web.xml

@@ -40,5 +40,11 @@
             <argument type="service" id="router" on-invalid="ignore" />
             <argument type="service" id="request_stack" />
         </service>
+
+        <service id="translator_listener" class="Symfony\Component\HttpKernel\EventListener\TranslatorListener">
+            <argument type="service" id="translator" />
+            <argument type="service" id="request_stack" />
+            <tag name="kernel.event_subscriber" />
+        </service>
     </services>
 </container>