grid: keep maximum information when pushing to shacache

We just relax the conditions to have an OS match.
3 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

04:23:08

failed SlapOS.Eggs.UnitTest-Master.Python2

00:25:33

failed SlapOS.Eggs.UnitTest-Master.Python3

00:20:30