Reuse RNG in NoiseModel

[hakon-molven-4ss]

Description

Make use of a random number generator (RNG) in the NoiseModel class and support functions. Now, repeated calls to the NoiseModel class yields varying results, see

smsfusion-python/tests/test_noise.py

Line 165 in fe261e2

def test_multiple_calls_varying_output(self):

Checklist

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