The behaviour of the `include` module is badly defined (it try to choose
between statically importing the tasks and dynamically including them)
and can cause problems depending on any number of constraints (mostly if
it choose the wrong behaviour).
Replace it with the `import_tasks` (always statically import tasks) unless
the `include` is in a loop in which case we replace it with
`include_tasks` (always dynamically include tasks).
Not just esthetic, for some reason ansible refused to run with '-'
somewhere and I just could not find where, changing variables and
tags to use '_' fixed it. It's more consistent anyway.
