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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:
<!--- Paste example playbooks or commands between quotes below -->
```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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have_tags = [have_tag for have_tag in have_tags if have_tag['Key'] != dead_tag]
            if dead_tags:
                connection.delete_tags(Tags=dead_tags)
            zipped = zip(have_tags, want_tags)
            if len(have_tags) != len(want_tags) or not all(x == y for x, y in zipped):
                changed = True
                connection.create_or_update_tags(Tags=asg_tags)
        
        
        if load_balancers and not as_group['LoadBalancerNames']:
            changed = True
            try:
                attach_load_balancers(connection, group_name, load_balancers)
            except botocore.exceptions.ClientError as e:
                module.fail_json(msg="Failed to update Autoscaling Group.",
                                 exception=traceback.format_exc(), **camel_dict_to_snake_dict(e.response))
            except botocore.exceptions.BotoCoreError as e:
                module.fail_json(msg="Failed to update Autoscaling Group.",
                                 exception=traceback.format_exc())
        
        elif as_group['LoadBalancerNames']:
            change_load_balancers = load_balancers is not None
            
            if not load_balancers:
                load_balancers = list()
            wanted_elbs = set(load_balancers)
            has_elbs = set(as_group['LoadBalancerNames'])
            
            if has_elbs - wanted_elbs and change_load_balancers: