New feature to purge included dir

[daks]

PR progress checklist (to be filled in by reviewers)

• [ ] Changes to documentation are appropriate (or tick if not required)
• [ ] Changes to tests are appropriate (or tick if not required)
• [ ] Reviews completed

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What type of PR is this?

Primary type

• [ ] [build] Changes related to the build system
• [ ] [chore] Changes to the build process or auxiliary tools and libraries such as documentation generation
• [ ] [ci] Changes to the continuous integration configuration
• [X] [feat] A new feature
• [ ] [fix] A bug fix
• [ ] [perf] A code change that improves performance
• [ ] [refactor] A code change that neither fixes a bug nor adds a feature
• [ ] [revert] A change used to revert a previous commit
• [ ] [style] Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc.)

Secondary type

• [X] [docs] Documentation changes
• [ ] [test] Adding missing or correcting existing tests

Does this PR introduce a BREAKING CHANGE?

No.

Related issues and/or pull requests

65 must be merged first

Describe the changes you're proposing

• add a new pillar purge_includedir
• when the includedir (/etc/sudoers.d generally) is created, if the pillar is true it purges the directory
• the pillar is by default set to false to keep previous behaviour

Pillar / config required to test the proposed changes

sudoers:
  purge_includedir: true

Debug log showing how the proposed changes work

Documentation checklist

• [ ] Updated the README (e.g. Available states).
• [X] Updated pillar.example.

Testing checklist

To add this to tests, I need to setup a complete new test suite. Not sure it's worth it.

• [ ] Included in Kitchen (i.e. under state_top).
• [ ] Covered by new/existing tests (e.g. InSpec, Serverspec, etc.).
• [ ] Updated the relevant test pillar.

Additional context

[pull-assistant[bot]]

Best reviewed: commit by commit

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Optimal code review plan

     refactor: convert map.jinja to new standards      refactor: change pillar calls      feat: implement option to purge included files directory

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[daks]

@aboe76 I had totally forgot this PR: it's now rebased and tests are OK

[myii]

Nice work, @daks -- we got there eventually! Thanks for the review, @aboe76.

[saltstack-formulas-travis]

:tada: This PR is included in version 0.23.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: