<!--- Verify first that your feature was not already discussed on GitHub -->
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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 -->

- Id: arn:aws:lambda:eu-central-1:123456789012:function:my-lambda-function
'''
RETURN = '''
deregistration_delay_timeout_seconds:
    description: The amount time for Elastic Load Balancing to wait before changing the state of a deregistering target from draining to unused.
    returned: when state present
    type: int
    sample: 300
health_check_interval_seconds:
    description: The approximate amount of time, in seconds, between health checks of an individual target.
    returned: when state present
    type: int
    sample: 30
health_check_path:
    description: The destination for the health check request.
    returned: when state present
    type: str
    sample: /index.html
health_check_port:
    description: The port to use to connect with the target.
    returned: when state present
    type: str
    sample: traffic-port
health_check_protocol:
    description: The protocol to use to connect with the target.
    returned: when state present
    type: str
    sample: HTTP
health_check_timeout_seconds:
    description: The amount of time, in seconds, during which no response means a failed health check.