Fix task-runner so it can work with Drupal 7 and Drupal 8.
Closed issues:
- Unable to get it working for Drupal 7 #89
Merged pull requests:
- Issue #89: Make sure it works with Drupal 7 and 8. #90 (drupol)
- OPENEUROPA-1322: Use the proper Docker way of overriding docker-composer.yml file. #88 (drupol)
