Update .gitlab-ci.yml

1 job from master in 1 second (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #9484
build

00:00:01

 
Name Stage Failure
failed
build Build
Fetching changes...
HEAD is now at f7591ad Update .gitlab-ci.yml
From https://forge.etsi.org/rep/SAREF/saref-pipeline
f7591ad..1383ed0 master -> origin/master
Checking out 1383ed00 as master...
Skipping Git submodules setup
$ cd / && find javac
find: ‘javac’: No such file or directory
ERROR: Job failed: exit status 1