fix(service): reload the docker service when daemon.json has changed

[danny-smit]

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

Does this PR introduce a BREAKING CHANGE?

No.

Related issues and/or pull requests

Follow up of https://github.com/saltstack-formulas/docker-formula/pull/282

Describe the changes you're proposing

Ensure that the docker daemon is reloaded when changes are applied to the daemon.json.

Pillar / config required to test the proposed changes

docker:
  pkg:
    docker:
      daemon_config:
        insecure-registries:
          - dockerhost.test.home:443

Debug log showing how the proposed changes work

The 'watch' added to the 'service.running' state causes the service to be restarted:

          ID: docker-software-service-running-docker
    Function: service.running
        Name: docker
      Result: True
     Comment: Service restarted
     Started: 13:55:09.038487
    Duration: 466.054 ms
     Changes:   
              ----------
              docker:
                  True

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

Current tests execute a clean installation. The problem occurs when salt runs a second time with configuration changes for the daemon.json. It is difficult to get this included in the tests.

[danny-smit]

@noelmcloughlin Thanks for reviewing @noelmcloughlin and @myii What is the correct procedure to get this pull request merged?

[noelmcloughlin]

I just wait a day or two for any objections - or someone else to take initiative in merging. Happy to merge now!!

[saltstack-formulas-travis]

:tada: This PR is included in version 2.0.6 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket:

[danny-smit]

@noelmcloughlin Thanks for explaining and merging!