[test] call rql.parse with unicode objects
Allows to get same results from rqlst.as_string() in python 2 and 3
fromcubicweb.schemas.baseimportin_group,CWSourceSchemaConfig# copy __permissions__ to avoid modifying a shared dictionaryin_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',)}