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##### SUMMARY
elb_network_lb and elb_target_group should support UDP, currently only HTTP, HTTPS and TCP are supported by ansible.

Based on the current pages, UDP and TCP_UDP are supported as protocols:
- https://docs.aws.amazon.com/elasticloadbalancing/latest/network/create-listener.html
- https://docs.aws.amazon.com/elasticloadbalancing/latest/network/create-target-group.html

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
- elb_target_group
- elb_network_lb

##### ADDITIONAL INFORMATION
It would be useful to use UDP as a protocol for an NLB, additionally, attached target groups would need to support UDP.

TCP_UDP is another protocol that it would be useful to add support for (a port that would take TCP or UDP traffic and not care)

<!--- Paste example playbooks or commands between quotes below -->
```yaml
    - name: Create logstash target group
      elb_target_group:
        name: logstash_bunyan_production_tg
        protocol: udp
        port: 5600
        vpc_id: "{{ vpc_facts.vpcs[0].id }}"
        state: present

    - name: Create nlb
      elb_network_lb:
        name: logstash_nlb
        subnets: "{{ private_subnets + public_subnets }}"
        health_check_path: "/"
        health_check_port: "9600"
        health_check_protocol: "http"
        protocol: "udp"
        port: "5600"
        listeners:
          - Protocol: UDP
            Port: 5600
            DefaultActions:
              - Type: forward
                TargetGroupName: logstash_bunyan_production_tg
        state: present
```

<!--- HINT: You can also paste gist.github.com links for larger files -->

if LooseVersion(botocore.__version__) < LooseVersion('1.7.2'):
        module.fail_json(msg="target_type ip requires botocore version 1.7.2 or later. Version %s is installed" %
                         botocore.__version__)
def create_or_update_target_group(connection, module):
    changed = False
    new_target_group = False
    params = dict()
    params['Name'] = module.params.get("name")
    if module.params.get("target_type") != "lambda":
        params['Protocol'] = module.params.get("protocol").upper()
        params['Port'] = module.params.get("port")
        params['VpcId'] = module.params.get("vpc_id")
    tags = module.params.get("tags")
    purge_tags = module.params.get("purge_tags")
    deregistration_delay_timeout = module.params.get("deregistration_delay_timeout")
    stickiness_enabled = module.params.get("stickiness_enabled")
    stickiness_lb_cookie_duration = module.params.get("stickiness_lb_cookie_duration")