Add uptimes to device and cluster REST APIs

Change-Id: I0ccdf4e33135be4bcfd1674a76ff4b39e992268b
diff --git a/core/api/src/main/java/org/onosproject/net/utils/ForwardingDeviceService.java b/core/api/src/main/java/org/onosproject/net/utils/ForwardingDeviceService.java
index acca07f..3a3eea2 100644
--- a/core/api/src/main/java/org/onosproject/net/utils/ForwardingDeviceService.java
+++ b/core/api/src/main/java/org/onosproject/net/utils/ForwardingDeviceService.java
@@ -127,4 +127,9 @@
         return delegate.localStatus(deviceId);
     }
 
+    @Override
+    public long getLastUpdatedInstant(DeviceId deviceId) {
+        return delegate.getLastUpdatedInstant(deviceId);
+    }
+
 }