[server/test] don't rely on a sorted output from .object_relations()
Fixes test under python -R. Related to #4959402.
# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr## This file is part of CubicWeb.## CubicWeb is free software: you can redistribute it and/or modify it under the# terms of the GNU Lesser General Public License as published by the Free# Software Foundation, either version 2.1 of the License, or (at your option)# any later version.## CubicWeb is distributed in the hope that it will be useful, but WITHOUT# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more# details.## You should have received a copy of the GNU Lesser General Public License along# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.""""""fromcubicweb.server.hookimportHookCALLED_EVENTS={}classStartupHook(Hook):__regid__='mystartup'events=('server_startup',)def__call__(self):CALLED_EVENTS['server_startup']=TrueclassShutdownHook(Hook):__regid__='myshutdown'events=('server_shutdown',)def__call__(self):CALLED_EVENTS['server_shutdown']=TrueclassLoginHook(Hook):__regid__='mylogin'events=('session_open',)def__call__(self):CALLED_EVENTS['session_open']=self._cw.user.loginclassLogoutHook(Hook):__regid__='mylogout'events=('session_close',)def__call__(self):CALLED_EVENTS['session_close']=self._cw.user.login