Fixes zookeeper_node and zookeeper::service with runit

[bbaugher]

Originally started this to fix a namespace issue with the zookeeper_node provider referencing the zookeeper provider instead of the zookeeper client.

The other fixes were surprises I found when setting up testing for this

[solarce]

I'd been meaning to add some tests but hadn't had time, so yay!

[jakedavis]

Hey @bbaugher, thanks a lot for the PR!

I have one comment. Otherwise, this PR seems legit. Thanks for taking a look at zookeeper_node; that is some old functionality that hasn't gotten the love it deserves, so it's super rad to see it get a look. Thanks for the tests too, love it.

[bbaugher]

Removed the include_recipes from the service recipe.

[jakedavis]

Thanks!