Fix configurator error in progress report page

progress report shows an error like this:

![progress report page showing error 500](/uploads/6857ba9d8405d1bbba35b0857bc765d8/Screenshot_2020-04-17_at_18.04.03.png)

See merge request !1103

bt5/erp5_configurator/SkinTemplateItem/portal_skins/erp5_configurator_wizard/ConfiguratorTool_viewRunningInstallationMessage.py

@@ -13,7 +13,10 @@ is_bt5_installation_running = installation_status['bt5']['all']!=0 and \
 if not is_bt5_building_running:
   all_bt5s = float(installation_status['bt5']['all'])
   current_bt5s = float(installation_status['bt5']['current'])
-  bt5_percent_of_total = current_bt5s / all_bt5s
+  if all_bt5s:
+    bt5_percent_of_total = current_bt5s / all_bt5s
+  else:
+    bt5_percent_of_total = 1
   calc_percentage = calc_percentage + building_bt5_part_percentage + \
                     bt5_percent_of_total*installation_bt5_part_percentage
 

bt5/erp5_configurator_standard_ui_test/SkinTemplateItem/portal_skins/erp5_configurator_standard_ui_test/Zuite_assertEndConfiguration.py

@@ -5,8 +5,14 @@ message_list = ["Configuration is over. Enjoy your new ERP5 system!",
                 "You will be redirected to a form in which you can login using",
                 "one of yours newly created ERP5 user accounts."]
 
+portal.REQUEST.RESPONSE.setHeader('content-type', 'text/plain')
 for message in message_list:
   if not message in html_status_report:
-    return 'False'
+    print "Error: {message} not found in status report".format(message=message)
 
-return 'True'
+for log in portal.error_log.getLogEntries():
+  print "Error: {type} {value} {tb_text}".format(**log)
+
+if str(printed):
+  return printed
+return 'True'
\ No newline at end of file