Add script to run linters.

The scprit `lint_check.sh` under utils runs the same linters as the
Github Actions, with the same configuration.

The changes on setup.cfg are required if flake8-docstrings is used,
so its output is the same as pydocstlye.

utils/lint_check.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+topdir=`dirname $(dirname $0)`
+
+flake8 .
+pydocstyle .
+
+ANSIBLE_LIBRARY=${ANSIBLE_LIBRARY:-"${topdir}/plugins/modules"}
+ANSIBLE_MODULE_UTILS=${ANSIBLE_MODULE_UTILS:-"${topdir}/plugins/module_utils"}
+
+export ANSIBLE_LIBRARY ANSIBLE_MODULE_UTILS
+
+yaml_dirs=(
+    "${topdir}/tests/*.yml"
+    "${topdir}/tests/*/*.yml"
+    "${topdir}/tests/*/*/*.yml"
+    "${topdir}/playbooks/*.yml"
+    "${topdir}/playbooks/*/*.yml"
+    "${topdir}/molecule/*/*.yml"
+    "${topdir}/molecule/*/*/*.yml"
+)
+
+ansible-lint --force-color ${yaml_dirs[@]}
+
+yamllint -f colored ${yaml_dirs[@]}