Ignore some Flake8 errors
Flake8 implicitely ignores some errors, and new versions tend to add new errors. This change explicitely lists the errors we want to ignore.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Flake8 implicitely ignores some errors, and new versions tend to add new errors. This change explicitely lists the errors we want to ignore.