Netflix/asgard — pull request #560 by cfieber (2014-05-04 21:14:22+00:00)
Title: Allow int parameters with the value "0" in ClusterController

Implementation of convertToIntOrUseDefault could never accept 0 as a valid value since it would evaluate
to false and return the default value.

The use case this fix addresses is I want to create the next ASG in the cluster at size 0, then scale it
up with more controls to account for autoscaling scenarios (Instance termination disabled, etc)