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/ofagent/BUILD b/apps/ofagent/BUILD
index e5e805a..118d957 100644
--- a/apps/ofagent/BUILD
+++ b/apps/ofagent/BUILD
@@ -5,7 +5,7 @@
     "@openflowj//jar",
     "//core/store/serializers:onos-core-serializers",
     "//core/common:onos-core-common",
-    "//incubator/api:onos-incubator-api",
+    "//apps/virtual/api:onos-apps-virtual-api",
     "//providers/openflow/flow:onos-providers-openflow-flow",
     "//protocols/openflow/api:onos-protocols-openflow-api",
 ]
@@ -39,6 +39,9 @@
     category = "Traffic Engineering",
     description = "OpenFlow agent application for virtualization subsystem.",
     included_bundles = BUNDLES,
+    required_apps = [
+        "org.onosproject.virtual",
+    ],
     title = "OpenFlow Agent",
     url = "http://onosproject.org",
 )