Update netconfig xml for Oplink device

Change-Id: Idaab45c053bd65e37e2bc4065a617af4ae7510fe
diff --git a/drivers/oplink/src/main/java/org/onosproject/drivers/oplink/OplinkOpticalUtility.java b/drivers/oplink/src/main/java/org/onosproject/drivers/oplink/OplinkOpticalUtility.java
index 37f1d77..5a993d9 100644
--- a/drivers/oplink/src/main/java/org/onosproject/drivers/oplink/OplinkOpticalUtility.java
+++ b/drivers/oplink/src/main/java/org/onosproject/drivers/oplink/OplinkOpticalUtility.java
@@ -177,6 +177,7 @@
                 .withSelector(selector)
                 .withTreatment(treatment)
                 .withPriority(DEFAULT_PRIORITY)
+                .makePermanent()
                 .fromApp(behaviour.handler().get(CoreService.class).getAppId(DEFAULT_APP))
                 .build();