created dynamically upon loading of portal type classes, meaningful
for Preference Tool (to get preference values from the default
Preference) and egov (which defines attributes on the portal type
itself)


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43886 20353a03-c40f-0410-a6d1-a30d3c3de9de