contentStatus not present on layer

[mjuniper]

If getContent is called on a9d8d9a9d3814ed08a364b3099b9aa59, which is a Feature Service, contentStatus will be present on the results as expected (which is to say, not always, but when it is set as deprecated or authoritative). However, if getContent is called on a9d8d9a9d3814ed08a364b3099b9aa59_0, which is a layer in that Feature Service, contentStatus will not be present.

We should add the contentStatus of the parent item to the response.