Changed random from static to a field in the simulator #238
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Fixes #226
The test failed because another test used random generator, and this made changed the pseudo random numbers generated for the seed test.
This PR makes rand a field in the simulator, this prevents the above collision. This fix is important not only for the tests, but also for DP, allowing to reproduce the responses of each rank.
This PR also changes the uuid initialization: it now creates its own rand (with the same seed), to prevent the collision with random numbers generation and ensure reproducible results.