We disable the E203 (whitespace before ':') and E501 (line too long)
linter rules since these conflict with ruff-format. We also rework a
statement in 'keystoneauth1/tests/unit/test_session.py' since it's
triggering a bug in flake8 [1] that is currently (at time of authoring)
unresolved.
[1] https://github.com/PyCQA/flake8/issues/1948
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: Ief5c1c57d1e72db9fc881063d4c7e1030e76da43
127d7be2b7