WIP: Add deb sources

As more and more repos will depend on correctly setting up the internal deb sources, it is probably a good idea to make this part of the default CI config templates.

Pushing this as a WIP to test it. Feedback is welcome, @jon.azpiazu.

.gitlab-industrial-ci-kinetic-no-rosinstall.yml

@@ -23,6 +23,7 @@ industrial_ci_kinetic:
   variables:
     ROS_DISTRO: kinetic
     ROS_PARALLEL_JOBS: "-j2" # keep this for now, since there seems to be memory limit issues in the ci VM
+    BEFORE_SCRIPT: "wget -O - https://git.code.tecnalia.com/tecnalia_robotics-public/gitlab_templates/raw/add-deb-sources/scripts/add-deb-sources.bash | bash"
   when: always
 
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