message: Use VLOG(2) to hide rarely-wanted batch output
diff: #include "tensorflow/core/lib/io/record_reader.h"
  #include "tensorflow/core/platform/env.h"
  #include "tensorflow/core/platform/file_system.h"
  +#include "tensorflow/core/platform/logging.h"
  using google::cloud::bigtable::bigendian64_t;
  using google::cloud::bigtable::CreateDefaultDataClient;
  @@ -176,6 +177,10 @@ void PortGamesToBigtable(const std::string& gcp_project_name,
  table.BulkApply(std::move(game_batch));
  auto finish_time = absl::Now();
  double elapsed = absl::ToDoubleSeconds(finish_time - start_time);
  + VLOG(2) << "Total changes: " << changes << " at " << changes / elapsed
  + << " changes/second";
  + VLOG(2) << "Total games: " << paths.size() << " at " << paths.size() / elapsed
  + << " games/second";
  }
  } // namespace tf_utils
  