test/ethernet_interface: Improve syscall test coverage

Change-Id: Ia71a030f2e2e19f2cc191992929ef08d0fa917c2
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/test/test_vlan_interface.cpp b/test/test_vlan_interface.cpp
index c4734b1..9c3a1ea 100644
--- a/test/test_vlan_interface.cpp
+++ b/test/test_vlan_interface.cpp
@@ -40,13 +40,13 @@
                                            MockManager& manager)
     {
         mock_clear();
-        mock_addIF("test0", 1);
+        mock_addIF("test0", /*idx=*/1);
         return {bus,
                 "/xyz/openbmc_test/network/test0",
                 config::Parser(),
                 manager,
-                false,
-                true};
+                /*emitSignals=*/false,
+                /*nicEnabled=*/true};
     }
 
     void createVlan(VlanId id)