message: we need BUILD_TAG env variable from jenkins inside docker-compose
diff: node {
  - def docker_compose = "docker run -t --rm -v \$WORKSPACE:\$WORKSPACE -v /var/run/docker.sock:/var/run/docker.sock -w \$WORKSPACE docker/compose:1.13.0 -f docker-compose.ci.yaml -p lagoon"
  + def docker_compose = "docker run -t --rm -e BUILD_TAG=\$BUILD_TAG -v \$WORKSPACE:\$WORKSPACE -v /var/run/docker.sock:/var/run/docker.sock -w \$WORKSPACE docker/compose:1.13.0 -f docker-compose.ci.yaml -p lagoon"
  deleteDir()
  