When creating the following bucket notification configuration:
```json
{
    "QueueConfigurations": [
        {
            "Id": "some-id",
            "QueueArn": "arn:aws:sqs:eu-central-1:123456789:my-queue",
            "Events": [
                "s3:ObjectCreated:*"
            ],
            "Filter": {
                "Key": {
                    "FilterRules": [
                        {
                            "Name": "Prefix",
                            "Value": "path/to/folder/"
                        },
                        {
                            "Name": "Suffix",
                            "Value": ".json"
                        }
                    ]
                }
            }
        }
    ]
}
```
and adding some files to S3, I get the following errors from localstack:

```
localstack.services.s3.s3_listener: Unknown filter name: "Prefix"
localstack.services.s3.s3_listener: Unknown filter name: "Suffix"
```

When I change the FilterRule names from "Prefix" to "prefix" and "Suffix" to "suffix", everything works. AWS supports the capitalised name, so this looks like a bug in localstack.
if not message:
        if error_type == 'ResourceNotFoundException':
            message = 'Resource not found.'
        elif error_type == 'ResourceAlreadyExistsException':
            message = 'Resource already exists.'
    response = make_response(jsonify({'error': message}))
    response.headers['x-amzn-errortype'] = error_type
    return response, code
def get_domain_config_status():
    return {
        'CreationDate': '%.2f' % time.time(),
        'PendingDeletion': False,
        'State': 'Active',
        'UpdateDate': '%.2f' % time.time(),
        'UpdateVersion': randint(1, 100)
    }
def get_domain_config(domain_name):