[test] make unittest_webconfig independant of CWD
if apphome is unset in ApptestConfiguration constructor, this later looks
for a 'data' directory in CWD, making this test runnable only from
web/test (and pytest do chdir before executing tests, so we did not noticed
this problem).
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',)}