[repository] forbid usage of set_attributes() in before_add_entity set_attributes() will generate a RQL query that will silently fail. An explicit error is better. You can still use the ``entity[attr] = value`` notation that won't generate a SQL query but still update the inner state of the entity and its edited_attributes attribute.

"""pre 3.6 bw compat"""
# pylint: disable-msg=W0614,W0401
from warnings import warn
warn('moved to cubicweb.mixins', DeprecationWarning, stacklevel=2)
from cubicweb.mixins import *