Fix behavior of mock DescribeAutoScalingGroups when no names supplied
Fix behavior of mock DescribeAutoScalingGroups when no names supplied

aledbf/kops,kubernetes/kops,aledbf/kops,justinsb/kops,robinpercy/kops,aledbf/kops,robinpercy/kops,robinpercy/kops,kubernetes/kops,justinsb/kops,robinpercy/kops,kubernetes/kops,aledbf/kops,justinsb/kops