[devtools] properly close open access on tearDown
avoiding further warning about living sessions while the repo is turned off.
The doc string says:
The RepoAccess need to be closed to destroy the associated Session.
TestCase usually take care of this aspect for the user.
but that wasn't true until now.
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',)}