Update .gitlab-ci.yml

1 job for master in 36 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #625
build

00:00:36

 
Name Stage Failure
failed
build Test
  intel-mkl-2019.0-045 2019.0-045
intel-mkl-2018.4-057 2018.4-057
intel-mkl-2018.3-051 2018.3-051
intel-mkl-2018.2-046 2018.2-046
intel-mkl-2018.1-038 2018.1-038
intel-mkl-2018.0-033 2018.0-033

E: Package 'intel-mkl' has no installation candidate
ERROR: Job failed: exit code 1