* Handle empty answer of ansible-lint
The variable a:lines might be empty if ansible-lint exited early, in
that case json_decode would trow an error.
* Use ales JSON decode function
* Fix ansible-lint linter definition.
Use ansible-lint's feature auto-detection instead of temporary file.
For auto-detection to work, ansible project has to be also a git repository.
Don't use yaml rules. These are checked by yamllint.
Refactor pattern to work with ansible-lint >=5.0 version.
Clean-up obsolete test cases.
* Pull Request changes
