ci(gitlab-ci): add `rubocop` linter (with `allow_failure`) [skip ci]
ci(gitlab-ci): add `rubocop` linter (with `allow_failure`) [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/277

saltstack-formulas/nfs-formula,saltstack-formulas/nfs-formula,saltstack-formulas/nfs-formula