fixup! base,core: move RoundingTool and RoundingModel to erp5_core

"template_keep_path_list" definition was wrong, the tool is uninstalled
when updating in wrong order

bt5/erp5_base/bt/template_keep_path_list

 portal_components/document.erp5.RoundingModel
-portal_components/document.erp5.RoundingTool
+portal_components/tool.erp5.RoundingTool
 portal_components/interface.erp5.IRoundingTool
 portal_introspections
 portal_memcached/persistent_memcached_plugin