[.gitlab-ci.yml] ldhi: use gitlab variables

4 jobs for branch/default in 4 minutes and 28 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Deploy
passed pages #325403

00:00:15

passed pages:deploy

00:00:01

 
  Test Performances
passed lhci #329942

00:04:12

passed lhci #325404

00:11:30