used M::Roles::HistoryAction::do_request_history() function to update request_history instaed of dierct in M::Request::new_request(); hilis3 convert changes for merging flow_screen lab-tests with flow_cytometry section}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1205 4177bd82-f056-0410-812d-caef170e3fa0
