* Automated using https://github.com/myii/ssf-formula/pull/16

* Semi-automated using `ssf-formula` (v0.5.0)
* Fix errors shown below:

```bash
chrony-formula$ $(grep "\- yamllint" .travis.yml | sed -e "s:^\s\+-\s\(.*\):\1:")
pillar.example
  1:1       warning  missing document start "---"  (document-start)
  21:3      warning  comment not indented like content  (comments-indentation)
```

* Automated using `ssf-formula` (v0.1.0-rc.1)

* Use balanced matrix based on `template-formula` guidelines
* Initial ref: https://github.com/saltstack-formulas/template-formula/issues/118
* Fedora still disabled due to existing errors:
  - `Job for chronyd.service failed because a timeout was exceeded.`

* Run `chrony.config` as workaround
  - `.config` not called by `chrony`
* Disable `fedora` for the time being due to `systemd` issue
  - Refusing to accept PID outside of service control group,
    acquired through unsafe symlink chain: /var/run/chrony/chronyd.pid