Ensure check-mode works

[pieterlexis-tomtom]

Description of PR This commit ensures that check-mode works on systems when this role is run without any telegraf being installed.

Before

fatal: [host-1]: FAILED! => {"changed": false, "msg": "Could not find the requested service telegraf: host"}

After

fatal: [host-1]: FAILED! => {"changed": false, "msg": "Could not find the requested service telegraf: host"}
...ignoring

Type of change

Bugfix Pull Request

[dj-wasabi]

Thanks! 👍