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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 -->

balancer-generated cookie is considered stale. The range is 1 second to 1 week (604800 seconds).
    type: int
  stickiness_type:
    description:
      - The type of sticky sessions. The possible value is lb_cookie.
    default: lb_cookie
    type: str
  successful_response_codes:
    description:
      - The HTTP codes to use when checking for a successful response from a target.
      - Accepts multiple values (for example, "200,202") or a range of values (for example, "200-299").
      - Requires the I(health_check_protocol) parameter to be set.
    required: false
    type: str
  tags:
    description:
      - A dictionary of one or more tags to assign to the target group.
    required: false
    type: dict
  target_type:
    description:
      - The type of target that you must specify when registering targets with this target group. The possible values are
        C(instance) (targets are specified by instance ID), C(ip) (targets are specified by IP address) or C(lambda) (target is specified by ARN).
        Note that you can't specify targets for a target group using more than one type. Target type lambda only accept one target. When more than
        one target is specified, only the first one is used. All additional targets are ignored.
        If the target type is ip, specify IP addresses from the subnets of the virtual private cloud (VPC) for the target
        group, the RFC 1918 range (10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16), and the RFC 6598 range (100.64.0.0/10).
        You can't specify publicly routable IP addresses.
    required: false
    default: instance