Update source for reporting module_name

[alopezz]

Ref: AGENT-11915

Return values from tasks haven't included a module_name field under invocation for probably a long time (this is not well documented by Ansible). This has caused the module tag key to always contain the value undefined. This seems to be the current reference on what the results dictionary is expected to contain.

Even though I can't tell when this happened, I did find two references to this problem for an existing plugin:

• Ansible not including module_name in invocation dictionary. ansible/ansible#27398: Issue reporting the same kind of problem.
• Fix nonexistent 'module_name' key in callbacks ansible/ansible#23587: PR that works around that.

I've based this fix on that PR, since Ansible documentation on what the objects passed to callbacks is rather sparse, and confirmed it to work. This has required to update existing callbacks to v2_ callbacks (and I can't see any drawbacks for that), for which I've used https://github.com/ansible/ansible/blob/b5e0293645570f3f404ad1dbbe5f006956ada0df/lib/ansible/plugins/callback/__init__.py#L526-L527 and the like as a reference of how one converts to the other.

I've also updated the module_stdout / module_stderr references to stdout / stderr following existing docs and my own observation during manual testing.

[illogik]

FWIW I've rolled this out in our environment and everything is working as expected now. Thank you for taking this on @alopezz !

[alopezz]

FWIW I've rolled this out in our environment and everything is working as expected now. Thank you for taking this on @alopezz !

Thanks for circling back to report! I'll get this reviewed and merged to master ASAP.