Pie chart has BarChart options

[Stephanevg]

BarPercentage
BarThickness
etc.. should not be there

    "options":  {
                    "barPercentage":  1,
                    "categoryPercentage":  1,
                    "responsive":  false,
                    "barThickness":  null,
                    "maxBarThickness":  0,
                    "offsetGridLines":  true,
                    "scales":  {
                                    "yAxes":  [
                                                    {
                                                        "ticks":  {
                                                                    "beginAtZero":  true
                                                                }
                                                    }
                                                ],
                                    "xAxes":  [

                                                ]
                                },
                    "title":  {
                                    "display":  true,
                                    "text":  "Test Title"
                                }
                }
}