Add .ansible.cfg for ansible-playbook

[simaishi]

For ManageIQ/manageiq#17564

cc @Ladas

[miq-bot]

Checked commit simaishi@6bc8816 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
0 files checked, 0 offenses detected
Everything looks fine. 🏆

[Ladas]

👍

[carbonin]

@simaishi @Ladas Looks like this is breaking embedded ansible.
https://bugzilla.redhat.com/show_bug.cgi?id=1600048

Just running ansible-playbook on an appliance with this change causes:

[root@localhost ~]# ansible-playbook
Error reading config file (/root/.ansible.cfg): File contains no section headers.
file: /root/.ansible.cfg, line: 1
'stdout_callback = json\n'

Looks like adding a [default] section to the file fixes the issue. Was that the intention here?

[Ladas]

@carbonin interesting, it works for me. So I think we can theoretically revert this, since this is only valid for ansible-playbook. For ansible-runner they've added parameter ansible-runner ... --json and this cfg is not being used