Bugfix for stale state not being cleared up when switch goes down.

Change-Id: Ieee11bbc4253789779c6cf2cc29d18c3173d9ec3
diff --git a/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingManager.java b/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingManager.java
index 37b27ad..65ffb53 100644
--- a/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingManager.java
+++ b/apps/segmentrouting/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingManager.java
@@ -1139,11 +1139,13 @@
                             event.type() == DeviceEvent.Type.DEVICE_UPDATED) {
                         DeviceId deviceId = ((Device) event.subject()).id();
                         if (deviceService.isAvailable(deviceId)) {
-                            log.info("Processing device event {} for available device {}",
+                            log.info("** DEVICE UP Processing device event {} "
+                                    + "for available device {}",
                                      event.type(), ((Device) event.subject()).id());
                             processDeviceAdded((Device) event.subject());
                         } else {
-                            log.info("Processing device event {} for unavailable device {}",
+                            log.info(" ** DEVICE DOWN Processing device event {}"
+                                    + " for unavailable device {}",
                                      event.type(), ((Device) event.subject()).id());
                             processDeviceRemoved((Device) event.subject());
                         }