Currently, if you make a warning mistake in your inline YAML you get
warning output like:
Warning, treated as error:
/home/.../zuul.d:728:Unexpected indentation.
This doesn't give you any clue as to what was actually wrong.
Rework adding the content so that we add the job/template name as the
source. You'll now get something like:
Warning, treated as error:
Job "failing-job" included in /home/.../doc/source/jobs.rst:6:Unexpected indentation.
which lets you know the job/template that is causing the error, and
where the auto include was sourced from.
Change-Id: I3144cb9bf689724d113c9b4b126f975f34f565c3
6b9fa90602