Ensure the close_drivers method in after_feature is always called. That was not happening when there had been a failure executing the preconditions, due to the exception that is raised in that case.
Coverage: 89.196% (+0.02%) from 89.175% when pulling 08df6c1d92ef8c65d4e3c5fc74c6052c976d3217 on fix/always_close_drivers_in_after_feature_hook into f7a3f1c4db231085c1a356d83bf799ff7056aa1b on master.
Ensure the close_drivers method in after_feature is always called. That was not happening when there had been a failure executing the preconditions, due to the exception that is raised in that case.