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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 -->

short_description: Manage a target group for an Application or Network load balancer
description:
    - Manage an AWS Elastic Load Balancer target group. See
      U(https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-target-groups.html) or
      U(https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html) for details.
version_added: "2.4"
requirements: [ boto3 ]
author: "Rob White (@wimnat)"
options:
  deregistration_delay_timeout:
    description:
      - The amount time for Elastic Load Balancing to wait before changing the state of a deregistering target from draining to unused.
        The range is 0-3600 seconds.
    type: int
  health_check_protocol:
    description:
      - The protocol the load balancer uses when performing health checks on targets.
    required: false
    choices: [ 'http', 'https', 'tcp', 'HTTP', 'HTTPS', 'TCP' ]
    type: str
  health_check_port:
    description:
      - The port the load balancer uses when performing health checks on targets.
        Can be set to 'traffic-port' to match target port.
      - When not defined will default to the port on which each target receives traffic from the load balancer.
    required: false
    type: str
  health_check_path:
    description:
      - The ping path that is the destination on the targets for health checks. The path must be defined in order to set a health check.