[18] Update protobuf definitions submodule

proto @ e8611009

-Subproject commit 37be183be5f248ada04ba58ca72784e0fe1d63d3
+Subproject commit e861100984116aacf6d84cb8a09dc0ef81041509

cpp/src/CMakeLists.txt

@@ -87,6 +87,6 @@ endif()
 # Generates the gRPC and Vereign services source code.
 add_custom_target(
   vcl-gen
-  COMMAND vcl-gen generate --templates-path=templates --output-path src
+  COMMAND vcl-gen generate -v --templates-path=templates --output-path src
   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
 )

cpp/tests/protobuf/json_test.cc

@@ -328,7 +328,7 @@ TEST_CASE("empty messages with OmitEmpty", "[protobuf]") {
 
   google::protobuf::util::JsonPrintOptions options;
   options.preserve_proto_field_names = true;
-  options.always_print_primitive_fields = true;
+  options.always_print_primitive_fields = false;
   std::string json;
   auto status = google::protobuf::util::MessageToJsonString(msg, &json, options);