Add a feature to allow setting the random seed.

[Sqeaky]

Currently Mezz_Test emits a random seed to allow one to reproduce the test order and other random values that are used in the Ruby tests. There is no place input this seed to allow the tests to actually use this. Fixing this will involve changes to the OptionParser in RootTest.rb and like changes in a few other files in the Test/TestingTools directory.