Now makes sure that the seed option gets into the configuration settings for the randomized data chunk job

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10430 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Was not exposing the seed property for the GUI - fixed.

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@10431 e0a1b77d-ad91-4216-81b1-defd5f83fa92