example: calculator: use YAML paths and service_names support

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ia2a51f5c9ef62715b9e65e3935c64d6da7a49f31
diff --git a/example/yaml/net/poettering/Calculator.interface.yaml b/example/yaml/net/poettering/Calculator.interface.yaml
index 4862f84..f130e59 100644
--- a/example/yaml/net/poettering/Calculator.interface.yaml
+++ b/example/yaml/net/poettering/Calculator.interface.yaml
@@ -86,3 +86,11 @@
           - name: Error
             description: >
                 The service has encountered an error.
+
+paths:
+    - instance: /net/poettering/calculator
+      description: Expected path of the instance.
+
+service_names:
+    - default: net.poettering.Calculator
+      description: Expected service name for the instance.