Declaring P4Runtime and gRPC protocol subsystems as apps

The advantage is that we don't have to carry over the driver all
required gRPC and P4Runtime bundles. Each module is now responsible for
bringing in its own runtime dependencies.

Change-Id: Icb1365e68d486f12fb1e25dc5d3937f42e3e1c62
diff --git a/protocols/grpc/proto/BUCK b/protocols/grpc/proto/BUCK
index f4a4033..f0df65d 100644
--- a/protocols/grpc/proto/BUCK
+++ b/protocols/grpc/proto/BUCK
@@ -2,7 +2,7 @@
     '//bucklets/grpc.bucklet'
 )
 
-PROTOC_VER = '3.0.2'
+PROTOBUF_VER = '3.0.2'
 GRPC_VER = '1.3.0'
 
 COMPILE_DEPS = [
@@ -10,13 +10,13 @@
     '//incubator/grpc-dependencies:grpc-core-repkg-' + GRPC_VER,
     '//lib:grpc-stub-' + GRPC_VER,
     '//lib:grpc-protobuf-' + GRPC_VER,
-    '//lib:protobuf-java-' + PROTOC_VER,
+    '//lib:protobuf-java-' + PROTOBUF_VER,
 ]
 
 grpc_jar(
     proto_match_patterns = ["*.proto"],
     proto_paths = ["$ONOS_ROOT/protocols/grpc/proto/", "$ONOS_ROOT"], #FIXME should not have to include ONOS_ROOT top level here
-    protoc_version = PROTOC_VER,
+    protoc_version = PROTOBUF_VER,
     plugin_version = GRPC_VER,
     deps = COMPILE_DEPS,
 )