Op-mon to use one IP and daemon within a cluster

1) make sure, slave nodes -> master node can connect over port 2080 
 2) on master node, add to /etc/xroad/conf.d/local.ini 
 [op-monitor]
host = <master-internal-IP> 
 
 3) on master node 
 
 service xroad-proxy restart 
 4) on slave nodes 
 service xroad-proxy restart 
 
 
 service xroad-opmon stop 
 service xroad-opmon mask