Moved generic Timestamp/ClockManager classes to onos-api
so they are usable by applications.

Change-Id: Icf0e92d12434dec782332e91b632da8066a85b60
diff --git a/core/store/dist/src/main/java/org/onosproject/store/intent/impl/GossipIntentStore.java b/core/store/dist/src/main/java/org/onosproject/store/intent/impl/GossipIntentStore.java
index 7de2d17..9412dac 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/intent/impl/GossipIntentStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/intent/impl/GossipIntentStore.java
@@ -36,8 +36,8 @@
 import org.onosproject.net.intent.Key;
 import org.onosproject.net.intent.PartitionService;
 import org.onosproject.store.AbstractStore;
-import org.onosproject.store.impl.MultiValuedTimestamp;
-import org.onosproject.store.impl.WallClockTimestamp;
+import org.onosproject.store.service.MultiValuedTimestamp;
+import org.onosproject.store.service.WallClockTimestamp;
 import org.onosproject.store.serializers.KryoNamespaces;
 import org.onosproject.store.service.EventuallyConsistentMap;
 import org.onosproject.store.service.EventuallyConsistentMapEvent;