Bump linter requirements - follow the changes
made in keystone in commits
order to fix compatibility with Python 3.10.
Remove python-dev from bindep - it's no longer
supported by jammy and lead us to the following
errors with the announce-release job:
No package matching 'python-dev' is available
Co-Authored-By: Herve Beraud <firstname.lastname@example.org>
Create a tox environment for running the unit tests against the lower
bounds of the dependencies.
Create a lower-constraints.txt to be used to enforce the lower bounds
in those tests.
Add openstack-tox-lower-constraints job to the zuul configuration.
for more details.
Also fix the lower bound for requests-kerberos.
Signed-off-by: Doug Hellmann <email@example.com>