Most parts of this patch come from wendelin, plus the tests and some fix.

testFunctionalRunMyDocSample was moved to erp5_run_my_doc (1d700b09) but it
was a mistake and should have been in erp5_user_tutorial where the Test Page
is defined.

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 nexedi/erp5!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 !1251