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
* Rename no-iterkeys test for consistency. * Require docs for all ansible-test sanity tests. * Initial ansible-test sanity docs. * Fix capitalization of Python. * Fix sanity code smell test false positives. * Fix another code-smell false positive.