Add codeclimate job to .gitlab-ci.yml

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

.gitlab-ci.yml

@@ -527,3 +527,18 @@ cache gems:
   only:
     - master@gitlab-org/gitlab-ce
     - master@gitlab-org/gitlab-ee
+
+codeclimate:
+  before_script: []
+  image: docker:latest
+  stage: post-test
+  variables:
+    SETUP_DB: "false"
+    DOCKER_DRIVER: overlay
+  services:
+    - docker:dind
+  script:
+    - docker pull codeclimate/codeclimate
+    - docker run --env CODECLIMATE_CODE="$PWD" --volume "$PWD":/code --volume /var/run/docker.sock:/var/run/docker.sock --volume /tmp/cc:/tmp/cc codeclimate/codeclimate analyze -f json > codeclimate.json
+  artifacts:
+    paths: [codeclimate.json]