time instead of runtime.

Since the portal type does not change, and since methods are wrapped
individually depending on the portal type, it is safe to do this at
registration time.

It means that no "useless" interactions are attached to objects,
and that the portal type check only happens once in the life of a method.
Overall, this should contribute to better performances.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42726 20353a03-c40f-0410-a6d1-a30d3c3de9de