Fix load_balancer_names parameter in ASInterface#create_auto_scaling_group.
Fix load_balancer_names parameter in
ASInterface#create_auto_scaling_group.

This prevents the error "RightAws::AwsError: MalformedInput: Top level
element may not be treated as a list" when creating an auto scaling
group with elastic load balancers.

rightscale/right_aws,zuazo-forks/right_aws,gentoo/right_aws,envato/right_aws