Update .gitlab-ci.yml

1 job for setchannelcerts in 2 minutes and 9 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
failed job #819

00:02:09

 
Name Stage Failure
failed
job Test
go: extracting google.golang.org/grpc v1.20.0
go: downloading google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19
go: downloading golang.org/x/text v0.3.2
go: extracting cloud.google.com/go v0.34.0
go: extracting google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19
go: extracting golang.org/x/text v0.3.2
LOCAL_TMP_DIR=/var/tmp
usermod: user '' does not exist
ERROR: Job failed: exit code 1