Merge pull request #2300 from hu-weihua/2299

Modify issue2299: xcatprobe xcatmn do not clear the /etc/hosts if no usefull cn node to check dhcp in the environment

xCAT-probe/subcmds/xcatmn

@@ -156,6 +156,7 @@ sub do_main_job {
         $rc |= $rst;
     }
 
+    cleanup();
     return $rc;
 }