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/virtual/api/BUILD b/apps/virtual/api/BUILD
new file mode 100644
index 0000000..da7ca40
--- /dev/null
+++ b/apps/virtual/api/BUILD
@@ -0,0 +1,11 @@
+COMPILE_DEPS = CORE_DEPS + JACKSON + [
+    "//apps/tunnel/api:onos-apps-tunnel-api",
+]
+
+TEST_DEPS = TEST_ADAPTERS
+
+osgi_jar_with_tests(
+    test_deps = TEST_DEPS,
+    visibility = ["//visibility:public"],
+    deps = COMPILE_DEPS,
+)