message: rafs/ut: lower log level to Info
  Too many log lines are dumped during UT. Lower the log level.
diff: @@ -1148,7 +1148,7 @@ pub mod tests {
  #[test]
  fn test_load_blob_table() {
  - setup_logging(None, log::LevelFilter::Trace).unwrap();
  + setup_logging(None, log::LevelFilter::Info).unwrap();
  let mut buffer = Vec::new();
  let first = Entry { foo: 1, bar: 2 };
  