erp5_web_renderjs_ui_test: stop relying on data-i18n attributes

5 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

01:04:32

passed ERP5.PerformanceTest-Master

00:32:30

failed ERP5.UnitTest-Master

02:00:00

passed SlapOS.Eggs.UnitTest-Master.Python2

00:17:16

passed SlapOS.Eggs.UnitTest-Master.Python3

00:18:12