Tripleo-ci jobs are broken after latest release of setuptools 61.0
because of breaking changes which are not backwork compatible,
details in related bug and [1].
[1] https://github.com/pypa/setuptools/issues/3197
Related-Bug: #1966382
Change-Id: Id60e8bc882f6c7944f89333fb539f6800ef43725
Executes all linters via pre-commit, which is much faster, guarantees
their version locking and allows upgrading them with a single command.
Before this change the only linter running via pre-commit was
ansible-lint.
Now we also run bashate, flake8 and yamllint via pre-commit.
For developer convenience we still keep the old tox environments
which allow running a single linter.
Added long_description_content_type to fix twine check failure
Change-Id: I037eae61921b2a84aa99838804f70e96ee8d8b13
Ghanshyam Mann