current output:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<cliOutput>
  <volGeoRep>
    <cmd-str>volume geo-replication music /tmp/t config key value value</cmd-str>
    <subop>set</subop>
    <op_value>value</op_value>
    <op_name>key</op_name>
    <type>3</type>
    <slave>/tmp/t</slave>
    <master>music</master>
    <host-uuid>69dded11-dca1-4fec-869d-56db783e9e7e</host-uuid>
    <vol-id>b3114c71-741b-4c6f-a39e-80384c4ea3cf</vol-id>
    <glusterd_workdir>/var/lib/glusterd</glusterd_workdir>
  </volGeoRep>
</cliOutput>

expected output:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<cliOutput>
  <opRet>0</opRet>
  <opErrno>0</opErrno>
  <opErrstr/>
</cliOutput>