cluster: remove k8s_token files from zones on write if found

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/cluster/regions.go

@@ -199,13 +199,25 @@ func (z *Zone) SyncRegions() error {
 	err := z.syncZoneRegions()
 	if err == nil {
 		z.ForEachMachine(func(p *Machine) bool {
+			err = z.syncMachineRegions(p)
+			return err != nil
+		})
+	}
+
+	return err
+}
+
+func (*Zone) syncMachineRegions(p *Machine) error {
+	var err error
+
 	if p.IsActive() {
 		err = p.RemoveFile("region")
 	} else {
 		err = p.WriteStringFile("none\n", "region")
 	}
-			return err != nil
+
-		})
+	if err == nil {
+		err = p.RemoveFile(RegionClusterTokenFileName)
 	}
 
 	return err