erp5_web_renderjs_ui_test: fix broken tests

See merge request !1731
15 jobs for erp5_drone_simulator
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:21:25

passed ERP5.PerformanceTest-Master

00:26:13

failed ERP5.UnitTest-Master

01:25:07

failed ERP5.UnitTest-Master.Medusa

04:19:04

passed SlapOS.Eggs.UnitTest-Master.Python2

00:15:15

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:30

passed ERP5.CodingStyleTest-Master

passed ERP5.PerformanceTest-Master

failed ERP5.UnitTest-Master

03:46:05

failed ERP5.UnitTest-Master

failed ERP5.UnitTest-Master.Medusa

passed SlapOS.Eggs.UnitTest-Master.Python2

00:14:06

failed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python2

00:18:29

passed SlapOS.Eggs.UnitTest-Master.Python2