trivial: noqa any 'assert' functions

trivial: noqa any 'assert' functions

There are advantages to sticking with unittest's use of camel case in
function names, but some code tools don't like this. noqa these lines
to hide the warnings.

Signed-off-by: Stephen Finucane <stephenfinucane@hotmail.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>