veyron2/ipc: 4 of n. 'Invoker and Signature' rationalisation.

- first CL to remove use of ReflectInvoker from our app code.

Change-Id: Ia2ef1ae14f248fa16c4f798d8fc68136c0e1d017
diff --git a/services/mounttable/lib/mounttable.go b/services/mounttable/lib/mounttable.go
index 8aef4b3..906f4ae 100644
--- a/services/mounttable/lib/mounttable.go
+++ b/services/mounttable/lib/mounttable.go
@@ -106,7 +106,7 @@
 		ms.elems = strings.Split(name, "/")
 		ms.cleanedElems = strings.Split(strings.TrimLeft(path.Clean(name), "/"), "/")
 	}
-	return ipc.ReflectInvoker(mounttable.MountTableServer(ms)), ms, nil
+	return mounttable.MountTableServer(ms), ms, nil
 }
 
 // findNode returns the node for the name path represented by elems.  If none exists and create is false, return nil.