[ONOS-4513] Move DefaultOpticalDevice to reduce package exported.

Change-Id: I88db1508290e8d3722d46e85b947b4fdc9f4b66d
diff --git a/drivers/lumentum/src/main/resources/lumentum-drivers.xml b/drivers/lumentum/src/main/resources/lumentum-drivers.xml
index e22b85a..bb4b87b 100644
--- a/drivers/lumentum/src/main/resources/lumentum-drivers.xml
+++ b/drivers/lumentum/src/main/resources/lumentum-drivers.xml
@@ -25,7 +25,7 @@
         <behaviour api="org.onosproject.incubator.net.faultmanagement.alarm.AlarmConsumer"
                    impl="org.onosproject.drivers.lumentum.LumentumAlarmConsumer"/>
         <behaviour api="org.onosproject.net.optical.OpticalDevice"
-                   impl="org.onosproject.net.optical.device.DefaultOpticalDevice"/>
+                   impl="org.onosproject.net.optical.DefaultOpticalDevice"/>
     </driver>
 </drivers>