Properly parse task includes

[croesnick]

Scenario

p0.yml:

- hosts: all
  tasks:
    - include_tasks: t0.yml

t0.yml:

- import_tasks: t1.yml
- include_role:
    name: r0

Actual Behaviour

The top-level task include in p0.yml is not parsed, and so isn't the role include in t0.yml.

Expected Behavior

We should get the dependency chain

p0.yml ---> t0.yml ----> t1.yml
                   \
                    +--> roles/r0

[croesnick]

Also take care of handling includes in blocks. Example (taken from stackoverflow):

- name: test
  hosts: all
  tasks:
    - block:
      - include: include1.yml
      - include: include2.yml
    when: doinclude  | default('true')