Allow building third-party apps based on gRPC

By publishing the repackaged grpc and protobuf artifacts

Change-Id: Ib3af7dba4f64948132aa70be31922de61d6f6ab2
diff --git a/apps/kafka-integration/app/BUILD b/apps/kafka-integration/app/BUILD
index 5d1f1ed..4cf8eaa 100644
--- a/apps/kafka-integration/app/BUILD
+++ b/apps/kafka-integration/app/BUILD
@@ -4,7 +4,7 @@
     "@kafka_clients//jar",
     "@javax_ws_rs_api//jar",
     "//utils/rest:onlab-rest",
-    "@com_google_protobuf//:protobuf_java",
+    "//lib:com_google_protobuf_protobuf_java",
     "//core/protobuf/models:onos-core-protobuf-models",
     "//core/protobuf/models/proto:onos-core-protobuf-models-proto",
 ]