Resolve "Support LFS in templates"

Closes #37 (closed)

ci-templates/lfs-pull.yml

+.lfs-pull-script: &lfs-pull-script
+  "find $$current_ws -type f -name .lfsconfig -execdir git lfs pull \\; ;\
+   find $$current_ws -type f -name .lfsconfig -execdir git lfs ls-files \\; ;"
+
+.industrial-ci:
+  BEFORE_INIT: "bash <(curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh);\
+              apt install -qq -y git-lfs; \
+              git config --global credential.helper store; \
+              echo https://$ARTIFACT_CI_USER:$ARTIFACT_CI_TOKEN@artifact.tecnalia.com > ~/.git-credentials ;"
+  BEFORE_BUILD_TARGET_WORKSPACE: *lfs-pull-script
+  BEFORE_BUILD_UPSTREAM_WORKSPACE: *lfs-pull-script