Bug on MultipleRuns using repetition and sample strategy

[wsenafranca]

The sample strategy does not repeat the same set of parameters during repetitions:

Expected output:

Running simulation 1/3 (X = 1, Y = 1, repetition 1/3)
Simulation finished in 0 seconds
Estimated time to finish all simulations: 14:47 (0 seconds)
Running simulation 2/3 (X = 1, Y = 1, repetition 2/3)
Simulation finished in 0 seconds
Estimated time to finish all simulations: 14:47 (0 seconds)
Running simulation 3/3 (X = 1, Y = 1, repetition 3/3)
Simulation finished in 0 seconds
Estimated time to finish all simulations: 14:47 (0 seconds)

Got:

Running simulation 1/3 (X = 1, Y = 1, repetition 1/3)
Simulation finished in 0 seconds
Estimated time to finish all simulations: 14:47 (0 seconds)
Running simulation 2/3 (X = 1, Y = 2, repetition 2/3)
Simulation finished in 0 seconds
Estimated time to finish all simulations: 14:47 (0 seconds)
Running simulation 3/3 (X = 2, Y = 1, repetition 3/3)
Simulation finished in 0 seconds
Estimated time to finish all simulations: 14:47 (0 seconds)

Model:

local MyModel = Model{
    x = 0,
    y = 0,
    finalTime = 1,
    init = function(self)
        self.timer = Timer{
            Event{action = function()
                self.value = 2 * self.x ^2 - 3 * self.x + 4 + self.y
            end}
        }
    end
}

import ('calibration')

MultipleRuns{
    model = MyModel,
    strategy = "sample",
    parameters = {
        x = Choice{min = 1, max = 2, step = 1},
        y = Choice{min = 1, max = 2, step = 1},
    },
    quantity = 1,
    repetition = 3,
    output = {"value"}
}