message: modified syntax of tags.
  for some reason vis-gitlab does not pick up tags.
diff: @@ -13,14 +13,16 @@ stages:
  .build-linux:
  stage: build
  needs: []
  - tags: [docker]
  + tags:
  + - docker
  source-protex-scan:
  stage: build
  image: amd64/openjdk:8
  script:
  - gitlab/source-scan-protex.sh
  - tags: [docker]
  + tags:
  + - docker
  dependencies: []
  allow_failure: true
  @@ -36,7 +38,9 @@ build-ubuntu18.04:
  build-osx-clang:
  stage: build
  - tags: [osx, clang]
  + tags:
  + - osx
  + - clang
  script:
  - gitlab/macos.sh
  artifacts:
  @@ -46,7 +50,9 @@ build-osx-clang:
  build-windows-msvc15:
  stage: build
  - tags: [win, msvc15]
  + tags:
  + - win
  + - msvc15
  script:
  - gitlab\win.ps1 "Visual Studio 15 2017 Win64" "v141" "Release"
  artifacts:
  @@ -67,13 +73,15 @@ test-run-ubuntu18.04:
  stage: test
  image: $DOCKER_REGISTRY/ospray/docker-images:ubuntu18.04
  needs: [build-ubuntu18.04]
  - tags: [docker]
  + tags:
  + - docker
  script:
  - gitlab/run.sh
  test-kw:
  stage: test
  - tags: [docker]
  + tags:
  + - docker
  image: $DOCKER_REGISTRY/ospray/docker-images:ubuntu18.04
  needs: [build-kw]
  script:
  