Port the sns module to boto3

[flowerysong]

SUMMARY

Ports the sns module to boto3 and AnsibleAWSModule. Adds support for protocol-specific messages targeting newer protocols, including 'lambda'.

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

sns

ANSIBLE VERSION

2.8

ADDITIONAL INFORMATION

ok: [tasty-deepone.syslog.x.mail.umich.edu -> localhost] => {
    "changed": false, 
    "invocation": {
        "module_args": {
            "application": null, 
            "aws_access_key": null, 
            "aws_secret_key": null, 
            "ec2_url": null, 
            "email": null, 
            "email_json": null, 
            "http": null, 
            "https": null, 
            "lambda": "{\"source\": \"pandora.x.mail.umich.edu\", \"message\": \"H\\u00e9r fylgir stu\\u00f0ning hverri sannkenning, sv\\u00e1 sem k\\u00f6llu\\u00f0 er eggin \\u00f3h\\u00f6r\\u00f0, en fullhvatir mennirnir.\", \"sourcetype\": \"ansible\"}", 
            "message_attributes": null, 
            "message_structure": "json", 
            "msg": "Hér er stafasetning sú, er hætti ræðr ok kveðandi gerir.", 
            "profile": "vdc-nonprod", 
            "region": "us-west-2", 
            "security_token": null, 
            "sms": null, 
            "sqs": null, 
            "subject": "Hello from Ansible", 
            "topic": "rootmail", 
            "validate_certs": true
        }
    }, 
    "message_id": "d46335db-7f32-5843-a5f2-61cfbf9eb7b5", 
    "msg": "OK"
}

[ansibot]

cc @mjschultz @willthames
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[ansibot]

Hi @flowerysong,

Thank you for the pullrequest, just so you are aware we have a dedicated Working Group for aws.
You can find other people interested in this in #ansible-aws on Freenode IRC
For more information about communities, meetings and agendas see https://github.com/ansible/community

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[willthames]

This is great work, thanks. Could we have a test suite too please.

[s-hertel]

Looks good. Just could use some integration tests to help ensure backwards compatibility.

[s-hertel]

Please wrap the client and paginator methods in a try/except and handle BotoCoreError and ClientError

[ryansb]

@willthames can you have a second look at this?

[willthames]

rebuild_merge