public FileSystem getFileSystem() {
    try {
      return FileSystem.get(jobConf);
    } catch (IOException e) {
      throw new IllegalStateException("Failed to get FileSystem", e);
    }
  }
@return Filesystem used by MiniMRCluster and MiniHBaseCluster
itests/hcatalog-unit/src/test/java/org/apache/hive/hcatalog/hbase/ManyMiniCluster.java