use sample with >1 values
use sample with >1 values

... in histogram tests as a workaround for
    https://github.com/plotly/plotly.js/issues/3881

etpinard/plotly.js,aburato/plotly.js,plotly/plotly.js,plotly/plotly.js,etpinard/plotly.js,etpinard/plotly.js,plotly/plotly.js,aburato/plotly.js,plotly/plotly.js