caucase: set up a host file which specified for it

See merge request !1074
12 jobs for master in 0 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:37

passed SlapOS.Eggs.UnitTest-Master.Python3

00:13:21

passed SlapOS.SlapRunner.ResilienceTest-Master

00:22:35

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:32:38

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

06:07:25

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

06:25:46

passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:43

passed SlapOS.Eggs.UnitTest-Master.Python3

00:23:55

passed SlapOS.SlapRunner.ResilienceTest-Master

00:21:53

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:21:53

passed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

05:30:06

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

05:35:49