NCLProvisioner reacts to changes in auto-reroute option

NCLProvisioner is registered as an EventListener despite of auto-reroute option value.
Auto-reroute value is read each time a LinkCongestionEvent is received and reroute is only called when autorerotue set to true.

Addittionaly, if there is an error reading auto-reroute option, it is assumed to be deactivated.