Add gitlab-ci

.gitlab-ci.yml

+stages:
+  - build
+  - test
+
+variables:
+  DOCKER_IMAGE_BASE: registry.icinga.com/build-docker
+  STACK_TARGET: snapshot
+  ICINGA_BUILD_TYPE: snapshot
+
+.build: &build
+  stage: build
+  tags:
+    - docker
+  image: ${DOCKER_IMAGE_BASE}/${DOCKER_IMAGE}
+  before_script:
+    - echo "machine git.icinga.com login ${ICINGA_GITLAB_USER} password ${ICINGA_GITLAB_TOKEN}" >> $HOME/.netrc
+  script:
+    - icinga-build-package
+  artifacts:
+    paths:
+      - build/*
+    expire_in: 1 week
+
+.test: &test
+  stage: test
+  tags:
+    - docker
+  image: ${DOCKER_IMAGE_BASE}/${DOCKER_IMAGE}
+  script:
+    - find build/
+    - icinga-build-test
+
+build centos 7:
+  variables:
+    DOCKER_IMAGE: centos/7:x86_64
+  <<: *build
+
+test centos 7:
+  variables:
+    DOCKER_IMAGE: centos/7:x86_64
+  dependencies:
+    - build centos 7
+  <<: *test