message: Turn a LOG into VLOG to avoid spamming logs.
diff: @@ -1190,8 +1190,7 @@ MasterSession::MasterSession(
  VLOG(1) << "Session " << handle_ << " #local " << env->local_devices.size()
  << " #remote " << remote_devs_->size();
  -
  - LOG(INFO) << "Start master session " << handle_
  + VLOG(1) << "Start master session " << handle_
  << " with config: " << session_opts_.config.ShortDebugString();
  }
  