Fix yaml syntax

gitlab-job-template.yml

@@ -29,12 +29,12 @@ variables:
     paths:
       - .ccache
   variables:
-    BASEIMAGE: "${MY_MODULE}-testing_${DOCKER_TAG}:${TRAVIS_BRANCH/\//_}"
     IMAGE: "${CI_REGISTRY_IMAGE}/ci_${MY_MODULE}-testing_${DOCKER_TAG}:${TRAVIS_COMMIT}"
   before_script:
     - apk --update add openssh-client rsync git file bash python3 py3-pip ccache
     - pip install -U docker jinja2 docopt
     - "# get image with fallback to master branch of the super repo"
+    - export BASEIMAGE="${MY_MODULE}-testing_${DOCKER_TAG}:${TRAVIS_BRANCH/\//_}"
     - echo "${REGISTRY}/${BASEIMAGE}"
     - echo "${MY_MODULE}-testing_${DOCKER_TAG}:master"
     - echo "${IMAGE}"