FriendsOfSymfony/FOSElasticaBundle — pull request #649 by Entea (2014-07-04 11:08:09+00:00)
Title: Gracefully handle debug.stopwatch absence

Without `on-invalid="ignore"` you'll get the following exception when debugging is off
```
[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]
The service "fos_elastica.client.default" has a dependency on a non-existent service "debug.stopwatch"
```