refactor(formula): align to template-formula & improve ci

[noelmcloughlin]

BREAKING CHANGE: Module .sls files are moved to /config/modules/ subdirectory.
template-formula alignment may introduce a breaking change. See README for states.

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
• [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

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

Does this PR introduce a BREAKING CHANGE?

YES

• moved modules SLS to config/modules/
• aligned to template-formula

Related issues and/or pull requests

Includes #225 and #259
Fixes #79, #238, #258, #262, #265, #266

Describe the changes you're proposing

While using this formula I saw various issues and inconsistencies.
This PR is an attempt to improve formula quality while keeping the same functionality.

• Align structure with template-formula (state naming, requisites, structure).
• Expanded CI/CD coverage (platforms and pillar data)
• Move all module SLS files to a subdirectory
• Pass expanded set of use cases on CENT 6/7/8, OpenSuse Leap 15, Ubuntu 18, Debian 10, Windows/Cygwin, Amazon2.
• Fix Consistency: state: enabled and enabled: true. #79, modules.sls: order breaks some modules #238, GID 0 is named "wheel" on BSD Unix-family operating systems #258, custom error/access log does not create folder on filesystem #262, modules section does not affect settings #265, execute purge after uninstall #266

I'm sorry the PR is so big but there is no easy way to improve feature/test coverage without restructuring.
The CI/CD is passing for all platforms except:

• CentOS 6 (works for me in Vagrant, but not Travis)
• Archlinux (needs work)

Further work is required to address remaining open issues.
There may be better ways of processing modules but this PR relies on the existing solutions.

Pillar / config required to test the proposed changes

Debug log showing how the proposed changes work

Documentation checklist

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

Testing checklist

• 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]

Best reviewed: commit by commit

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Optimal code review plan

     refactor(formula): align to template-formula & improve ci

     feat(arch): add archlinux support

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[noelmcloughlin]

Added support for Archlinux (CI/CD) with HTTPS/SSL and modules.

[noelmcloughlin]

I discussed this PR with @myii and because it's too big to review I'll selfie-merge on the following basis:

1. firstly the commit message lists all breaking/unbreaking changes
2. The extended and improved CI/CD is passing
3. That I'll become code owner if necessary.

Pillar data is unchanged. The primary change is state-names were refactored as part of the alignment with template-formula.

[saltstack-formulas-travis]

🎉 This PR is included in version 1.0.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[myii]

@noelmcloughlin Nice work, the breaking changes listed in the changelog make things so much easier to follow -- appreciate it.

[myii]

Just a little note for posterity.

I wasn't able to git pull these changes without manual operation (but I do use my formulas' repos in non-standard ways to most people). I was getting this error:

error: Updating the following directories would lose untracked files in them:
        apache/vhosts

Was able to check the problem using git clean in dry-run mode:

$   git clean -xdfn
...
Would remove apache/vhosts/.cleanup.sls.un~
Would remove apache/vhosts/.minimal.tmpl.un~
Would remove apache/vhosts/.proxy.tmpl.un~
Would remove apache/vhosts/.redirect.tmpl.un~
Would remove apache/vhosts/.standard.tmpl.un~
...

• https://stackoverflow.com/a/46140753

So the main point is that making modifications to the directory structure could lead to issues with certain files being present in the directories that are being moved (i.e. those covered by .gitignore).

This is more so a point of awareness, there's not much we could do about this.

[myii]

Standardised this implementation with 7dc0ece.

@noelmcloughlin It looks like you're using an older version of libtofs.jinja when preparing these PRs. The new version has been pushed to pretty much all formulas that are using TOFS.