@Override
        public void render(OutputStream stream) throws IOException {
            new JsonFormat(true).encode(stream, slime);
        }
HTTP handler for a mock /document/v1 API, used when &lt;document-api&gt; is not specified
in services.xml. Returns http status code 404 and a message describing that API is not configured,
pointing to documentation for how to do that.

@author hmusum
vespaclient-container-plugin/src/main/java/com/yahoo/document/restapi/resource/DummyDocumentV1ApiHandler.java