Add .gitlab-ci.yml

Status Job ID Name Coverage
  Test
failed #12726
build

00:00:07

failed #12717
build

failed #12725
build

00:00:09

 
Name Stage Failure
failed
build Test There is an unknown failure, please try again
Running with gitlab-ci-multi-runner 9.1.0 (0118d89)
on hoare@bw-cloud (8a640e7c)
Using Docker executor with image 3.5.0-jdk-8 ...
Using docker image sha256:5d8d5e60b3161c3f57f733f31a10ce41a3115cc35d493786541d38b0a3743da1 for predefined container...
Pulling docker image 3.5.0-jdk-8 ...
ERROR: Job failed: Error response from daemon: repository 3.5.0-jdk-8 not found: does not exist or no pull access