force the locale to C when starting firefox, otherwise ERP5 might be displayed in french

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41605 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/runFunctionalTest.py

@@ -245,6 +245,7 @@ user_pref("capability.principal.codebase.p1.subjectName", "");""" % \
       os.environ['DISPLAY'] = ':%s' %xvfb_display
     os.environ['MOZ_NO_REMOTE'] = '1'
     os.environ['HOME'] = self.profile_dir
+    os.environ['LC_ALL'] = 'C'
     # check if old zelenium or new zelenium
     try:
       urllib2.urlopen("%s/portal_tests/core/scripts/selenium-version.js" % self.portal_url)