* 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
This PR first and formost implements support for dot-seperate filetypes,
a very trivial change.
This closes#132
But more importantly, this PR vastly improves the test quality for
`ale#linter#Get`. It enables us to reset the state of ale's internal
linter cache, to facilitate better testing, as well as making use of
mocked linters instead of depending on linters on disk (which may
change). In addition, a dummy linter is defined to test the autoloading
behavior.
Header guards were removed from all linters as:
* A: ale won't try and load linters if they already exist in memory
* B: we can't reset state for testing if they can't be loaded again
