Improve seed random generator and use std random generator

[javierBarandiaran]

Use std::random_device instead of std::time as seed to initialize the random number generator. Use std random generator instead of Boost.
std::time as seed produces the same random numbers if the initialization is done in the same second.

[javierBarandiaran]

I see that there is a similar request. Closing this one and will open a new one with seed initialization