* Remove Category Acquired Membership Arity Constraint portal type in favor of Category Membership Arity Constraint and add a boolean in the view to handle both.
* Add a boolean in Category Existence Constraint view to handle Category Acquired Existence Constraint.
* Add missing Active Process in Activity Tools allowed_content_type.
* constraint_portal_type for CategoryExistenceConstraint_view, CategoryMembershipArityConstraint_view and CategoryRelatedMembershipArityConstraint_view should have always been a string to allow definition with a TALES Expression.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42930 20353a03-c40f-0410-a6d1-a30d3c3de9de