Do test that a helm plugin can return non-zero exit code other than 1
Do test that a helm plugin can return non-zero exit code other than 1

Signed-off-by: Yusuke Kuoka <ce4fb244530503667b572703d30221f925521433@gmail.com>

adamreese/helm,adamreese/deployment-manager,helm/helm,adamreese/deployment-manager,michelleN/deployment-manager,bacongobbler/helm,michelleN/deployment-manager,michelleN/deployment-manager,adamreese/deployment-manager,michelleN/deployment-manager,helm/helm,adamreese/deployment-manager,adamreese/deployment-manager,bacongobbler/helm,adamreese/helm