periodic reload slot table loop does not work

[sayto]

When one of nodes valkey cluster become fail, func Dispatcher.reloadTopology() does not start.

Problen in func slotsReloadLoop - it stars once

for range time.After(d.slotReloadInterval) can trigger onlu one event

my fix is:

-       periodicReloadInterval := 60 * time.Second
-       for range time.After(d.slotReloadInterval) {
+       for {
                select {
                case _, ok := <-d.slotReloadChan:
                        if !ok {
@@ -122,7 +121,7 @@ func (d *Dispatcher) slotsReloadLoop() {
                        } else {
                                d.slotInfoChan <- slotInfos
                        }
-               case <-time.After(periodicReloadInterval):
+               case <-time.After(d.slotReloadInterval):
                        glog.Infof("periodic reload triggered")