Use hostname also for MQTT listen interface

scripts/collectagent.service

@@ -4,7 +4,7 @@ After=cassandra.service
 
 [Service]
 Environment=LD_LIBRARY_PATH=%DCDB_PREFIX%/lib
-ExecStart=%DCDB_PREFIX%/bin/collectagent -m 0.0.0.0 -r 0.0.0.0 -c %H
+ExecStart=%DCDB_PREFIX%/bin/collectagent -m %H -c %H %DCDB_PREFIX%/etc
 StandardOutput=journal
 StandardError=journal
 Restart=always