login as manager before editing preferences, then login back to regular user

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35040 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5OOo/tests/testDms.py

@@ -113,10 +113,12 @@ class TestDocumentMixin(ERP5TypeTestCase):
     self.tic()
 
   def afterSetUp(self):
+    TestDocumentMixin.login(self)
     self.setDefaultSitePreference()
     self.setSystemPreference()
     transaction.commit()
     self.tic()
+    self.login()
 
   def setDefaultSitePreference(self):
     default_pref = self.portal.portal_preferences.default_site_preference