policy should be on one line to create queue

[bwagner5]

Issue #, if available:
N/A

Description of changes:

• The sqs queue creation command isn't quite right in the readme. The policy needs to be on a single line.

BEFORE:

$ QUEUE_POLICY=$(cat <<EOF
{
    "Version": "2012-10-17",
    "Id": "MyQueuePolicy",
    "Statement": [{
        "Effect": "Allow",
        "Principal": {
            "Service": ["events.amazonaws.com", "sqs.amazonaws.com"]
        },
        "Action": "sqs:SendMessage",
        "Resource": [
            "arn:aws:sqs:${AWS_REGION}:${ACCOUNT_ID}:${SQS_QUEUE_NAME}"
        ]
    }]
}
EOF
)

$ cat << EOF > /tmp/queue-attributes.json
{
  "MessageRetentionPeriod": "300",
  "Policy": "$(echo $QUEUE_POLICY | sed 's/\"/\\"/g')"
}
EOF

$ cat /tmp/queue-attributes.json
{
  "MessageRetentionPeriod": "300",
  "Policy": "{
    \"Version\": \"2012-10-17\",
    \"Id\": \"MyQueuePolicy\",
    \"Statement\": [{
        \"Effect\": \"Allow\",
        \"Principal\": {
            \"Service\": [\"events.amazonaws.com\", \"sqs.amazonaws.com\"]
        },
        \"Action\": \"sqs:SendMessage\",
        \"Resource\": [
            \"arn:aws:sqs:us-east-2::\"
        ]
    }]
}"
}

AFTER:

$ QUEUE_POLICY=$(cat <<EOF
{
    "Version": "2012-10-17",
    "Id": "MyQueuePolicy",
    "Statement": [{
        "Effect": "Allow",
        "Principal": {
            "Service": ["events.amazonaws.com", "sqs.amazonaws.com"]
        },
        "Action": "sqs:SendMessage",
        "Resource": [
            "arn:aws:sqs:${AWS_REGION}:${ACCOUNT_ID}:${SQS_QUEUE_NAME}"
        ]
    }]
}
EOF
)

$ cat << EOF > /tmp/queue-attributes.json
{
  "MessageRetentionPeriod": "300",
  "Policy": "$(echo $QUEUE_POLICY | sed 's/\"/\\"/g' | tr -d -s '\n' " ")"
}
EOF

$ cat /tmp/queue-attributes.json
{
  "MessageRetentionPeriod": "300",
  "Policy": "{ \"Version\": \"2012-10-17\", \"Id\": \"MyQueuePolicy\", \"Statement\": [{ \"Effect\": \"Allow\", \"Principal\": { \"Service\": [\"events.amazonaws.com\", \"sqs.amazonaws.com\"] }, \"Action\": \"sqs:SendMessage\", \"Resource\": [ \"arn:aws:sqs:us-east-2::\" ] }]}"
}

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[haugenj]

👍