Provide some service testing examples for folks to use in wrapper cookbooks

[luckymike]

Because this cookbook doesn't offer and service starting, it also doesn't have any serverspec examples for testing services. That makes it hard to sort out the service name to test in serverspec, for example. We'd do others a good turn by including some examples for testing the usage of this cookbook in wrappers.

[github-actions]

Marking stale due to inactivity. Remove stale label or comment or this will be closed in 7 days. Alternatively drop by the #sous-chefs channel on the Chef Community Slack and we'll be happy to help! Thanks, Sous-Chefs.