parallelized gce launch role

mail.yml

---
# file: roles/launch/tasks/main.yml

- name: Launch instances
  local_action: gce instance_names={{ names }} machine_type={{ type }}
                image={{ image }} network={{ network }} tags={{ tags }}
  register: gce_instances
  async: 7200
  poll: 0

- name: Wait for instance creation to complete
  async_status: jid={{ item.ansible_job_id }}
  register: gce_jobs
  until: gce_jobs.finished
  retries: 300
  with_items: gce_instances.results