Change record status: 
Introduced in branch: 
7.x-1.x
Introduced in version: 
7.x-1.0-alpha0
Description: 

Using a [module_name].services.yml file is now possible like in Drupal 8.

Please ensure to _only_ use lower case service names.

Changes needed

Enable the service_container_symfony submodule for that to work and depend on it instead of (or in addition to) on service_container.

Impacts: 
Module developers