Some playbooks might take very long to be processed, sometimes even more
than 10 minutes. Because Travis-CI has a timeout of 10 minutes without
any output, it might leave tests errored out.
'assert_playbook_idempotent_long' function is the same as
'assert_playbook_idempotent', but it will send the output periodically
to STDOUT to satisfy Travis.
Some playbooks might take very long to be processed, sometimes even more than 10 minutes. Because Travis-CI has a timeout of 10 minutes without any output, it might leave tests errored out.
'assert_playbook_idempotent_long' function is the same as 'assert_playbook_idempotent', but it will send the output periodically to STDOUT to satisfy Travis.