message: Fix to segmentation fault issue
  Fixed the segementation fault issue while running droneserver, it was due to
  conf file path issue.
diff: @@ -49,7 +49,11 @@ void RunServer()
  map_type map;
  std::string plugin;
  std::fstream file;
  - file.open("../proto/plugins.conf");
  + file.open("plugins.conf");
  + if(!file) {
  + std::cout << "Error in reading conf file" << std::endl;
  + return;
  + }
  std::vector<::grpc::Service *> list;
  ${PLUGIN_MAP_APPEND_STRING}
  @@ -80,8 +84,8 @@ ${PLUGIN_MAP_APPEND_STRING}
  ServerBuilder builder;
  builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
  builder.RegisterService(&service);
  - for (auto service : list) {
  - builder.RegisterService(service);
  + for (auto plugin_service : list) {
  + builder.RegisterService(plugin_service);
  }
  std::unique_ptr<Server> server(builder.BuildAndStart());
  std::cout << "Server listening on " << server_address << std::endl;
  