Removed ClockService<K, V> and replaced its usage with a BiFunction<K, V, Timestamp>

Change-Id: Ide8d979f9361f1aff6727a83733747f4512ef8ff
diff --git a/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java b/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java
index 8d14b4e..bf99264 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java
@@ -70,7 +70,7 @@
         properties = storageService.<String, String>eventuallyConsistentMapBuilder()
                 .withName("cfg")
                 .withSerializer(serializer)
-                .withClockService((k, v) -> clockService.getTimestamp())
+                .withTimestampProvider((k, v) -> clockService.getTimestamp())
                 .build();
 
         properties.addListener(new InternalPropertiesListener());