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AmazonMQ managed RabbitMQ requires special SSL #1237

@max-zilla

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@max-zilla

To support AmazonMQ connections with pika for Clowder 2, we need some extra SSL pieces that we could enable with a flag:
https://docs.aws.amazon.com/amazon-mq/latest/developer-guide/amazon-mq-rabbitmq-pika.html

def __init__(self, rabbitmq_broker_id, rabbitmq_user, rabbitmq_password, region):

        # SSL Context for TLS configuration of Amazon MQ for RabbitMQ
        ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
        ssl_context.set_ciphers('ECDHE+AESGCM:!ECDSA')

        url = f"amqps://{rabbitmq_user}:{rabbitmq_password}@{rabbitmq_broker_id}.mq.{region}.amazonaws.com:5671"
        parameters = pika.URLParameters(url)
        parameters.ssl_options = pika.SSLOptions(context=ssl_context)

        self.connection = pika.BlockingConnection(parameters)
        self.channel = self.connection.channel()

Note that this example also uses a pika.URLParameters() way to instantiate the params rather than what we currently use. We could just include AWS flags to enable this.

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