Adds return information to ec2_asg.

Returns the following information for the new/changed autoscaling group:

        name
        launch_config
        availability_zones
        cooldown
        default_cooldown
        desired_capacity
        enabled_metrics
        health_check_period
        health_check_type
        instance_id
        launch_config_name
        load_balancers
        max_size
        min_size
        placement_group
        termination_policies
        vpc_zone_identifier