Update the DCN configuration properties.
void updateDCNConfiguration(SUPConfigurationComponentVO configurationComponent)
      throws SUPAdminException;
  If successful, returns silently. If unsuccessful, throws SUPAdminException.
supConf.refreshClusterConfiguration();
SUPConfigurationComponentVO confVO = supConf.getDCNConfiguration();
confVO.getProperties().put("sup.dcn.http.get.enabled","true");
supConf.updateDCNConfiguration(confVO);
supConf.commitClusterConfiguration();