[session] drop useless getter and setter for security
Those function have very few user and does not anything fancy. Internal user now
access tx.read/write_security directly. External user have been blessed with a
writable property. They are only interested in the write part of they did not
used the return of the removed function. They access it through the session
since I prefer the external world to not be aware of Transaction yet.
from cubicweb.schemas.base import in_group, CWSourceSchemaConfig
# copy __permissions__ to avoid modifying a shared dictionary
in_group.__permissions__ = in_group.__permissions__.copy()
in_group.__permissions__['read'] = ('managers',)
cw_for_source = CWSourceSchemaConfig.get_relation('cw_for_source')
cw_for_source.__permissions__ = {'read': ('managers', 'users'),
'add': ('managers',),
'delete': ('managers',)}