It seems that we do no really want to set this particular variable to NULL. (causes badness in ess)

This commit was SVN r21673.

orte/runtime/orte_globals.c

@@ -637,7 +637,6 @@ static void orte_job_destruct(orte_job_t* job)
                 break;
             }
         }
-        orte_job_data = NULL;
     }
 }