if python >=2.7  use the option allow_no_value=True for ini_file.

After some failed attempts:

https://github.com/ansible/ansible/pull/8400
https://github.com/ansible/ansible/issues/8430
https://github.com/ansible/ansible/pull/8434
https://github.com/ansible/ansible/pull/8436

.... I think this one has no conflict. 

Thanks,
Nico