Ansible Playbook- Parallel Execution - ansible

Question

I have 3 tasks in a playbook. My requirement is to complete the first task and then the second and third tasks should happen in parallel. As by default, these three tasks will happen one after the other, is there a way to make the second and third task in parallel once the first one is done?
- hosts: conv4
remote_user: username
tasks:
- name: Start Services
script: app-stop.sh
register: console
- hosts: patchapp
remote_user: username
become_user: username
become_method: su
tasks:
- name: Stop APP Services
script: stopapp.sh
register: console
- debug: var=console.stdout_lines
- hosts: patchdb
remote_user: username
become_user: username
become_method: su
tasks:
- name: Stop DB Services
script: stopdb.sh
register: console
- debug: var=console.stdout_lines
I need to run Start Services task first and then once it is complete i need to run Stop APP Services and Stop DB Services tasks parallely.

Answer 1

1.Import playbook works fine.
play.yml
- import_playbook: play1.yml
- import_playbook: play2.yml
play1.yml
- hosts: localhost
tasks:
- debug:
msg: 'play1: {{ ansible_host }}'
play2.yml
- hosts:
- vm2
- vm3
tasks:
- debug:
msg: 'play2: {{ ansible_host }}'
2.Loop over include_tasks and delegate_to is a nogo.
An option would be to loop over include_tasks and delegate_to inside the task (see below). But there is an unsolved bug delegate_to with remote_user on ansible 2.0 .
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play.yml
- name: 'Test loop delegate_to'
hosts: localhost
gather_facts: no
vars:
my_servers:
- vm2
- vm3
tasks:
- name: "task 1"
debug:
msg: 'Task1: Running at {{ ansible_host }}'
- include_tasks: task2.yml
loop: "{{ my_servers }}"
task2.yml
- debug:
msg: 'Task2: Running at {{ ansible_host }}'
delegate_to: "{{ item }}"
ansible-playbook play.yml
PLAY [Test loop delegate_to]
TASK [task 1]
ok: [localhost] =>
msg: 'Task1: Running at 127.0.0.1'
TASK [include_tasks]
included: ansible-examples/examples/example-014/task2.yml for localhost
included: ansible-examples/examples/example-014/task2.yml for localhost
TASK [debug]
ok: [localhost -> vm2] =>
msg: 'Task2: Running at vm2'
TASK [debug]
ok: [localhost -> vm3] =>
msg: 'Task2: Running at vm3'
PLAY RECAP
localhost : ok=5 changed=0 unreachable=0 failed=0