add path filter in ParquetReader

Currently parquet-tools command fails when input is a directory with _SUCCESS file from mapreduce. Filtering those out like ParquetFileReader does fixes the problem.

```
parquet-cat /tmp/parquet_write_test
Could not read footer: java.lang.RuntimeException: file:/tmp/parquet_write_test/_SUCCESS is not a Parquet file (too small)

$ tree /tmp/parquet_write_test
/tmp/parquet_write_test
├── part-m-00000.parquet
└── _SUCCESS
```