Philip Schwartz authored Nov 08, 2019 and Steve Xuereb committed Nov 08, 2019

Allow the user to specify services inside of the `config.toml` for the
kubernetes executor, for example:

```
[runners.kubernetes]
  services = ["mysql", "redis:2.8", "postgres:9"]
```

reference https://gitlab.com/gitlab-org/gitlab-runner/issues/4470