Added reset before collecting new metrics to prevent dangling metrics

metrics/pve_node_sdn_collector.go

@@ -41,6 +41,8 @@ func (c *PveSdnCollector) CollectMetrics() error {
 		return err
 	}
 
+	c.state.Reset()
+
 	for _, node := range cluster.NodeStatuses {
 		sdns := resources.FindNodeSDN(node.Name)
 		if len(*sdns) > 0 {