* Every PR is currently showing as failed and `commitlint` is never running
* Disable these two platforms in the meantime; still ten platforms being tested
* `opensuse-423` is EOL in any case
Use py3 for latest salt version
Use Python 2 on old distros
Update Gemfile
Updated centos-6 run_command, as it does not use systemd
Added tests to verify correct package versions for all cases tested