bug symfony#17703 [FrameworkBundle] Support autowiring for TranslationInterface (dunglas)

This PR was squashed before being merged into the 2.8 branch (closes symfony#17703).

Discussion
----------

[FrameworkBundle] Support autowiring for TranslationInterface

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Commits
-------

2419725 [FrameworkBundle] Support autowiring for TranslationInterface

Author: fabpot

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

@@ -48,6 +48,8 @@
             <call method="setConfigCacheFactory">
                 <argument type="service" id="config_cache_factory" />
             </call>
+
+            <autowiring-type>Symfony\Component\Translation\TranslatorInterface</autowiring-type>
         </service>
 
         <service id="translator.logging" class="Symfony\Component\Translation\LoggingTranslator" public="false">