erp5_configurator_standard_ui_test: Fix testFunctionalConfigurator failures with erp5testnode (b955dbe0).

The following error occurred because setupAutomaticBusinessTemplateRepository()
was called and only added bt5/ directory but not bootstrap bt5s directory:
  BusinessTemplateMissingDependency: While analysing erp5_dhtml_style the following dependency could not be satisfied: erp5_xhtml_style ()
  Reason: Business Template could not be found in the repositories

Instead assume that bt5 repositories are set up properly.

Also, running through erp5testnode requires apache-backend Timeout to be
increased as waiting for upgrader activities to be processed can take
~15 minutes (!377).