* Implement ERP5TypeInformation.allowType because TypeInformation.allowType
  from CMF is very slow.
* Using objectValues(meta_type=...) instead of objectValues(portal_type=...)
  speeds up a little.

git-svn-id: https://svn.erp5.org/repos/public/erp5/sandbox/portal_types@29283 20353a03-c40f-0410-a6d1-a30d3c3de9de