Detangling incubator: virtual nets, tunnels, resource labels, oh my

- virtual networking moved to /apps/virtual; with CLI & REST API
- tunnels and labels moved to /apps/tunnel; with CLI & REST API; UI disabled for now
- protobuf/models moved to /core/protobuf/models
- defunct grpc/rpc registry stuff left under /graveyard
- compile dependencies on /incubator moved to respective modules for compilation
- run-time dependencies will need to be re-tested for dependent apps

- /graveyard will be removed in not-too-distant future

Change-Id: I0a0b995c635487edcf95a352f50dd162186b0b39
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 bddb7a0..9a0584a 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
@@ -23,8 +23,6 @@
 import org.onosproject.cluster.ClusterService;
 import org.onosproject.cluster.ControllerNode;
 import org.onosproject.cluster.NodeId;
-import org.onosproject.incubator.net.virtual.NetworkId;
-import org.onosproject.incubator.net.virtual.VirtualNetworkIntent;
 import org.onosproject.net.intent.Intent;
 import org.onosproject.net.intent.IntentData;
 import org.onosproject.net.intent.IntentEvent;
@@ -68,6 +66,7 @@
 import static org.onosproject.store.OsgiPropertyConstants.GIS_PERSISTENCE_ENABLED;
 import static org.onosproject.store.OsgiPropertyConstants.GIS_PERSISTENCE_ENABLED_DEFAULT;
 import static org.slf4j.LoggerFactory.getLogger;
+
 /**
  * Manages inventory of Intents in a distributed data store that uses optimistic
  * replication and gossip based techniques.
@@ -158,8 +157,6 @@
         KryoNamespace.Builder intentSerializer = KryoNamespace.newBuilder()
                 .register(KryoNamespaces.API)
                 .register(IntentData.class)
-                .register(VirtualNetworkIntent.class)
-                .register(NetworkId.class)
                 .register(MultiValuedTimestamp.class);
 
         EventuallyConsistentMapBuilder currentECMapBuilder =