testsuite: run all tests, don't exit on first failure

testsuite: run all tests, don't exit on first failure

Instead of exiting on the first failing test execute all tests and
report overall failure as needed.

This gives us a better overview - which do we have single failure or
multiple instances need work - and more consistent results numbers.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://github.com/kmod-project/kmod/pull/246
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>