message: mute producer log
diff: @@ -1542,7 +1542,7 @@ int producer_plugin::produce_block_start() {
  return producer_plugin_impl::start_block_result::succeeded == _start_block_result;
  // ilog("block_production_loop return: ${n}",("n",(int)ret));
  } else {
  - ilog("not in manual generate block mode.");
  +// ilog("not in manual generate block mode.");
  return 0;
  }
  }
  @@ -1555,7 +1555,7 @@ int producer_plugin::produce_block_end() {
  _produce_block_start = false;
  if (!my->_manual_gen_block) {
  - ilog("not in manual generate block mode.");
  +// ilog("not in manual generate block mode.");
  return 0;
  }
  