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/apps/kafka-integration/app/BUILD b/apps/kafka-integration/app/BUILD
index 2b39734..5d1f1ed 100644
--- a/apps/kafka-integration/app/BUILD
+++ b/apps/kafka-integration/app/BUILD
@@ -5,8 +5,8 @@
     "@javax_ws_rs_api//jar",
     "//utils/rest:onlab-rest",
     "@com_google_protobuf//:protobuf_java",
-    "//incubator/protobuf/models:onos-incubator-protobuf-models",
-    "//incubator/protobuf/models/proto:onos-incubator-protobuf-models-proto",
+    "//core/protobuf/models:onos-core-protobuf-models",
+    "//core/protobuf/models/proto:onos-core-protobuf-models-proto",
 ]
 
 osgi_jar_with_tests(