Test the history server Rest API for getting the job conf. This
 * requires created a temporary configuration file.
 *
 *   /ws/v1/history/mapreduce/jobs/{jobid}/conf
Test the history server Rest API for getting the job conf. This
 * requires created a temporary configuration file.
 *
 *   /ws/v1/history/mapreduce/jobs/{jobid}/conf | TestHsWebServicesJobConf.java