erp5_web_renderjs_ui&test: return error if appcache file is not existed

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

00:49:12

passed ERP5.PerformanceTest-Master

00:32:26

failed ERP5.UnitTest-Master

01:32:19

failed SlapOS.Eggs.UnitTest-Master.Python2

00:21:39

failed SlapOS.Eggs.UnitTest-Master.Python3

00:15:00