@Override
  public void setConf(Configuration conf) {
    this.conf = conf;
  }
Generate a classpath string containing any jars required by mapreduce jobs. Specify additional
values by providing a comma-separated list of paths via -Dtmpjars.
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/util/MapreduceDependencyClasspathTool.java