Add a determinism integration test(s)

[ryanjulian]

It would be nice to have a integration test for the sampler(s) and/or an algorithm which ensures that set_seed() is working properly.

Essentially, it would launch two experiments with the same seed and verify these are (approximately) equal

• initialization of the neural networks
• the samples they receive
• output from the learning algorithm

[ryanjulian]

@nish21 @zhanpenghe i think you both would be interested in this