[DependencyInjection] Fix Yaml file loader test
[DependencyInjection] Fix Yaml file loader test

This broke when 2.0 was recently merged into master with b9daae28476385d16984a729b9e7c8e30911fa23, as the Yaml fixture change from 24a0d0a2dcf334efc7d85f1c816c01d7fa4111f8 was not included.

symfony/dependency-injection,symfony/DependencyInjection,oswaldderiemaecker/DependencyInjection