TOFSv2: Change duplicate use of files; use templates list instead

[myii]

The current implementation uses files twice.

Here:

template-formula/pillar.example

Lines 31 to 32 in c71915e

	# dirs:
	# files: files_alt

And here:

template-formula/pillar.example

Lines 34 to 37 in c71915e

	# files:
	# template-config:
	# - 'example_alt.tmpl'
	# - 'example_alt.tmpl.jinja'

Since the second one is a list of templates to use, I suggest this is changed to:

    # templates:
    #   template-config:
    #     - 'example_alt.tmpl'
    #     - 'example_alt.tmpl.jinja'

The impact is fairly significant, since this needs to be done throughout:

1. pillar.example
2. macros.jinja
3. TOFS_pattern.md
4. All formulas that have already adapted to TOFSv2

Since TOFSv2 is very new, this change needs to be brought in ASAP. It hardly can be in use right now but it soon could be.

[myii]

@aboe76 Is it too late to make this change in systemd-formula?

[baby-gnu]

I think this is done by #76 and this issue can be closed. No?

[myii]

@baby-gnu Yes, thank you!