allow failures

.gitlab-ci.yml

 test_debian_stretch:
   image: debian:stretch
   stage: test
-  only:
-    - tags
 # we need to run it in privileged mode due to: https://stackoverflow.com/questions/29683231/tomcat7-fail-to-start-inside-ubuntu-docker-container
   tags:
      - privileged
   artifacts:
     paths:
      - Debian*/*
+
+#allow failures so we have badges generated and ci doesn't stop
+  allow_failure: true
   script:
      - ./test_install.sh