Remove the cookbook-publisher lockfile if not running ruby 2.X

templates/chef.yml

@@ -123,5 +123,6 @@ push-cookbook:
     - rm -rf Gemfile Gemfile.lock || true
     - git clone https://$OPS_CLONE_USERNAME:$OPS_CLONE_PASSWORD@ops.gitlab.net/gitlab-cookbooks/cookbook-publisher.git /tmp/cookbook-publisher
     - cp /tmp/cookbook-publisher/publisher.rb /tmp/cookbook-publisher/Gemfile /tmp/cookbook-publisher/Gemfile.lock .
+    - if [[ "$(ruby -v | awk '{print $2}')" =~ ^2 ]]; then echo "Using cookbook-publisher lockfile" ; else rm Gemfile.lock ; fi
     - bundle install
     - bundle exec ruby publisher.rb