- clone action added

Default printout (used for order, packing lists, invoices etc) was raising
error for deliveries with cells when the resource descrption was only \n

See merge request !1253

erp5_user_tutorial_ui_test: dependency on erp5_accounting was missing (account_module).

runUnitTest: log_directory is imported from Unit Tests and thus must be global to avoid pylint error.

using command:

    msgattrib bt5/erp5_l10n_fr/MessageTranslationTemplateItem/fr/erp5_ui/translation.po --no-fuzzy --translated -s --no-wrap -o  bt5/erp5_l10n_fr/MessageTranslationTemplateItem/fr/erp5_ui/translation.po

See merge request nexedi/erp5!1251

1. set 0 as default value, otherwise leaflet_display_side will always be true
2. show message instead of crash
3. correct parameters
4. clean code

(and translate this to french as well)