Genericising the relationship between folders and workspaces - now one folder can be in many workspaces. Problem with the code though - when run from junit the relationship is set up okay, but when run in JBOSS the lams_workspace_workspace_folder records are not created.
added workspace and workspaceFolder maintenance code since it's easier done here rather than in service layer. workspace/workspaceFolder/organisation/user may need be remodeled to make thing clearer
