Pull own CI script images from artifactory

.gitlab-ci.yml

 shellcheck:
-  image: koalaman/shellcheck-alpine
+  image: tecnalia-docker-dev.artifact.tecnalia.com/koalaman/shellcheck-alpine
   script: shellcheck deploy/base/ros_entrypoint.bash scripts/*sh
   tags:
     - docker
@@ -12,7 +12,7 @@ shellcheck:
 # DL3008 Pin versions in apt-get install
 #   A bit overkill
 dockerfiles:
-  image: hadolint/hadolint:latest-debian
+  image: tecnalia-docker-dev.artifact.tecnalia.com/hadolint/hadolint:latest-debian
   script:
     - RET=0
     - hadolint --ignore DL3006 --ignore DL3008 deploy/base/Dockerfile || RET=1
@@ -22,7 +22,7 @@ dockerfiles:
     - docker
 
 yamllint:
-  image: sdesbure/yamllint
+  image: tecnalia-docker-dev.artifact.tecnalia.com/sdesbure/yamllint
   script: yamllint $(find . -name '*.yml' -o -name '*.yaml')
   tags:
     - docker