Performance save - Replace instances of Math.Random with Random.nextD…

[bd2019us]

…ouble

SYNAPSE-1102 Performance save - Replace instances of Math.Random with Random.nextDouble. Some slight performance can be saved when replacing Math.random with Random.nextDouble, due to Math.random not having to create an instance of Random.

[isudana]

There is no conclusive fact to claim that using Random.nextDouble() gives a significant performance gain over Math.Random().
I found the following resources, but those are not good enough to make a drastic change in the codebase.
https://stackoverflow.com/questions/738629/math-random-versus-random-nextintint
https://community.oracle.com/message/6596485?#6594485

Do you have any other resources or proof to prove that we could gain a performance improvement by doing this change?