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##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Add support for `MaxInstanceLifetime` option to AWS ec2_asg module.
AWS feature introduction link: https://aws.amazon.com/about-aws/whats-new/2019/11/amazon-ec2-auto-scaling-supports-max-instance-lifetime/

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ec2_asg

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Usage example:
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```yaml
- ec2_asg:
    name: myasg
    region: us-east-1
    launch_config_name: my_new_lc
    min_size: 1
    max_size: 5
    desired_capacity: 3
    max_instance_lifetime: 604800  # seconds
```

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wait_timeout = module.params.get('wait_timeout')
    group_name = module.params.get('name')
    as_group = describe_autoscaling_groups(connection, group_name)[0]
    count = 1
    wait_timeout = time.time() + wait_timeout
    while wait_timeout > time.time() and count > 0:
        module.debug("waiting for instances to terminate")
        count = 0
        as_group = describe_autoscaling_groups(connection, group_name)[0]
        props = get_properties(as_group)
        instance_facts = props['instance_facts']
        instances = (i for i in instance_facts if i in term_instances)
        for i in instances:
            lifecycle = instance_facts[i]['lifecycle_state']
            health = instance_facts[i]['health_status']
            module.debug("Instance %s has state of %s,%s" % (i, lifecycle, health))
            if lifecycle.startswith('Terminating') or health == 'Unhealthy':
                count += 1
        time.sleep(10)
    if wait_timeout <= time.time():
        
        module.fail_json(msg="Waited too long for old instances to terminate. %s" % time.asctime())
def wait_for_new_inst(connection, group_name, wait_timeout, desired_size, prop):