Merge branch 'fix_ci' into 'master'

fix ci

See merge request !45

.gitlab-ci.yml

 image: $CONTAINER_TEST_IMAGE
 
 variables:
-  CONTAINER_TEST_IMAGE: gitlab-registry.mpcdf.mpg.de/$CI_PROJECT_PATH:$CI_BUILD_REF_NAME
+  CONTAINER_TEST_IMAGE: gitlab-registry.mpcdf.mpg.de/$CI_PROJECT_PATH:$CI_COMMIT_REF_NAME
   GIT_SUBMODULE_STRATEGY: recursive
 
 stages:
@@ -17,7 +17,7 @@ build_docker_from_scratch:
   before_script:
     - ls
   script:
-    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN gitlab-registry.mpcdf.mpg.de
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN gitlab-registry.mpcdf.mpg.de
     - docker build -t $CONTAINER_TEST_IMAGE --no-cache .
     - docker push $CONTAINER_TEST_IMAGE
 
@@ -29,7 +29,7 @@ build_docker_from_cache:
   before_script:
     - ls
   script:
-    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN gitlab-registry.mpcdf.mpg.de
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN gitlab-registry.mpcdf.mpg.de
     - docker build -t $CONTAINER_TEST_IMAGE .
     - docker push $CONTAINER_TEST_IMAGE