- hosts: vagrant
  roles:
    - db
    - web
  vars_files:
    - group_vars/development
    - secrets.yml

- hosts: vagrant
  roles:
    - db
    - web
  vars_files:
    - group_vars/vagrant
    - secrets.yml

Fix missing group variable file.
Fix missing group variable file.

I renamed the "development" group_vars file to "vagrant", but forgot to
change the name in the "vagrant" playbook.
