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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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as_group = describe_autoscaling_groups(connection, group_name)[0]
    props = get_properties(as_group)
    module.debug("Waiting for %s = %s, currently %s" % (prop, desired_size, props[prop]))
    
    wait_timeout = time.time() + wait_timeout
    while wait_timeout > time.time() and desired_size > props[prop]:
        module.debug("Waiting for %s = %s, currently %s" % (prop, desired_size, props[prop]))
        time.sleep(10)
        as_group = describe_autoscaling_groups(connection, group_name)[0]
        props = get_properties(as_group)
    if wait_timeout <= time.time():
        
        module.fail_json(msg="Waited too long for new instances to become viable. %s" % time.asctime())
    module.debug("Reached %s: %s" % (prop, desired_size))
    return props
def asg_exists(connection):
    group_name = module.params.get('name')
    as_group = describe_autoscaling_groups(connection, group_name)
    return bool(len(as_group))
def main():
    argument_spec = ec2_argument_spec()
    argument_spec.update(
        dict(
            name=dict(required=True, type='str'),
            load_balancers=dict(type='list'),
            target_group_arns=dict(type='list'),
            availability_zones=dict(type='list'),
            launch_config_name=dict(type='str'),