Error "Unknown dimension open" for candlestick chart with custom dimension names and zoom enabled

### Version
5.0.0-beta.2

### Steps to reproduce
Setup a candlestick chart with encoded data with custom dimension names and zooming. It throws the following error

```
Unkown dimension open
validateDimensions @ echarts.js:32773
List.each @ echarts.js:32048
SliderZoomView._renderDataShadow @ echarts.js:75310
SliderZoomView._buildView @ echarts.js:75157
SliderZoomView.render
```

### What is expected?
Custom dimensions like "Open" instead of default dimension "open" should work.

### What is actually happening?
It is throwing error.

---
While building the zoom slider, it gets the shadowDim in CandlestickSeries.js which is "open" which is being validated without mapping it back to the dimensions defined in the dataset.