test CAPIF_DOCKER_REGISTRY -> CI_JOB_TOKEN

capif/templates/ci_staging.gitlab-ci.yml

@@ -245,7 +245,7 @@ staging_build_and_push:
    - export TMP_PWD=$PWD
    - echo "TMP_PWD=$TMP_PWD"
    - echo "### docker login###"
-   - docker login --username $CI_REGISTRY_USER --password $CAPIF_DOCKER_REGISTRY $CI_REGISTRY
+   - docker login --username $CI_REGISTRY_USER --password $CI_JOB_TOKEN $CI_REGISTRY
    - echo "----------------------------------------------------"
    - echo "### build and push nginx image###"
    - cd $TMP_PWD/services/nginx/