* Semi-automated using `ssf-formula` (v0.5.0)
* Fix errors shown below:
```bash
sudoers-formula$ $(grep "\- yamllint" .travis.yml | sed -e "s:^\s\+-\s\(.*\):\1:")
pillar.example
6:23 warning truthy value should be one of [false, true] (truthy)
test/salt/pillar/kitchen.sls
3:1 warning missing document start "---" (document-start)
7:1 error too many blank lines (1 > 0) (empty-lines)
test/salt/pillar/default.sls
1:1 warning missing document start "---" (document-start)
3:23 warning truthy value should be one of [false, true] (truthy)
```
It should be possible to not overwrite the main sudoers configuration
file and only provide files to be included. This introduces a new Pillar
variable to achieve that. If it's not set we default to the old
behaviour of managing that file.
