def stack_status
      resp = cfn.describe_stacks(stack_name: @parent_stack_name)
      status = resp.stacks[0].stack_status
      [resp, status]
    end
def stack_status
      resp = cfn.describe_stacks(stack_name: @parent_stack_name)
      status = resp.stacks[0].stack_status
      [resp, status]
    end
All CloudFormation states listed here:
 http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-describing-stacks.html