order to make optimisation configuration in unit test
- isIndexable is not a property any more, it is a ConstantGetter
 instance, so it works like a property and like a method
- same thing for isPredicate, isTemplate, isDelivery... we can
 start moving using only methods.
- do not define isTemplate, isDelivery... when it is already
  available thanks to inheritance
- new methods generated for all ERP5 objects : provides[InterfaceName].
 For instance, "providesIMovement()" will return True or False for
 any ERP5 object.
- new method "is[Group]Type" generated for all ERP5 objects. The group
 here is group of portal types (like getPortalDeliveryTypeList()). So
 on any ERP5 object, you can do "isDeliveryType()", and this will
 returns True or False.
- add tests

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@30704 20353a03-c40f-0410-a6d1-a30d3c3de9de