Render complete not called if chart re-rendered with the same props

[markov00]

Describe the issue
As find out here #2703 (comment) the chart render complete is not called if the charts rerender with exactly the same props.
This cause the chart (that still render correctly) to have the render-complete status turned to false.

We should find the correct way to close this rendering also under this circumstances.

Expected behaviour

A chart re-rendered with exactly the same props should be marked as render-complete: true.
We can probably not increase the rendering count, but since it is rendering on the screen it should marked as render-complete.

Checklist

• The proper chart type label has been added (e.g. :xy, :partition)
• The proper feature labels have been added (e.g. :interactions, :axis)
• Every related Kibana issue is listed under Kibana Cross Issues list and the kibana cross issue tag is applied