Make scheduler not miss deletion events even in the case of a resync.

pkg/client/cache/store.go

@@ -68,6 +68,9 @@ type ExplicitKey string
 // The key uses the format <namespace>/<name> unless <namespace> is empty, then
 // it's just <name>.
 func MetaNamespaceKeyFunc(obj interface{}) (string, error) {
+	if key, ok := obj.(ExplicitKey); ok {
+		return string(key), nil
+	}
 	meta, err := meta.Accessor(obj)
 	if err != nil {
 		return "", fmt.Errorf("object has no meta: %v", err)