Universe generation scripts: commented out random.jumpahead() call in the seed function for the default rng (suggested by  Cjkjvfnby and Dilvish on the forums)

git-svn-id: svn://svn.code.sf.net/p/freeorion/code/trunk@7759 dbd5520b-6a0a-0410-a553-f54834df5b05