add sync period to helm repo

Signed-off-by: LiHui <andrewli@kubesphere.io>

pkg/utils/mathutil/mathutil.go

@@ -0,0 +1,9 @@
+package mathutil
+
+// Max returns the larger of a and b.
+func Max(a, b int) int {
+	if a >= b {
+		return a
+	}
+	return b
+}