Sync stable-2.5 test infrastructure with devel: - shippable.yml - test/runner/ - test/sanity/ - test/utils/ - docs/docsite/rst/dev_guide/testing/sanity/ - test/integration/targets/*/aliases
* Add module support to yamllint sanity test. * Fix duplicate keys in module RETURN docs. * Fix syntax in return_common docs fragment. * Fix duplicate keys in module EXAMPLES docs.