Use import_playbook instead of include about tendrl-ansible

[mbukatov]

Accepting this feature for future upstream release 1.5.5

[mbukatov]

Hmm, this import_playbook can't be used instead of include:

• it have to be used at playbook level, not at a tasks level
• one can't use when with it

I could use include_role, it would be better to check the reason behind these changes first.

[mbukatov]

Actually, all we need here is include_tasks or import_tasks:

• https://docs.ansible.com/ansible/devel/user_guide/playbooks_reuse_includes.html#includes-vs-imports
• https://docs.ansible.com/ansible/devel/user_guide/playbooks_reuse.html

[mbukatov]

@dahorak when you have time, could you check which option (include_tasks vs import_tasks) makes more sense and create a pull request?

[mbukatov]

Ansible 2.6 no longer complains about this. Eh.

[mbukatov]

Actually it's still there, next version of ansible won't have include:

[DEPRECATION WARNING]: 'include' for playbook includes. You should use 
'import_playbook' instead. This feature will be removed in version 2.8. 
Deprecation warnings can be disabled by setting deprecation_warnings=False in 
ansible.cfg.