slapos_jio: fix google callback cookie

See merge request !320
3 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:08:36

passed SlapOS.Eggs.UnitTest-Master.Python2

00:07:46

passed SlapOS.Eggs.UnitTest-Master.Python3

00:11:27