Fix Debian's family repository filename

[javierbertoli]

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

---

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
• [X] [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
• [X] [test] Adding missing or correcting existing tests

Does this PR introduce a BREAKING CHANGE?

No.

Related issues and/or pull requests

Describe the changes you're proposing

The saltstack repository file in Debian's family was renamed from saltstack.list to salt.list a few months ago, as showed in this commit in the bootstrap script.

The formula was still using the old filename, causing duplicated files in those instances with salt installed using the bootstrap.

This PR fixes that. In Debian's family, it:

• Removes the old repo file
• Adds the new repo file
• Also adds the saltstack keyring (as apt-key was deprecated).

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).
• [X] Covered by new/existing tests (e.g. InSpec, Serverspec, etc.).
• [X] Updated the relevant test pillar.

Additional context

[myii]

Nice work, thanks for this PR, @javierbertoli!

[saltstack-formulas-travis]

:tada: This PR is included in version 1.9.2 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: