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.
'CloudWatchLogsLogGroupArn': 'arn:aws:logs:%s:%s:log-group:sample-domain' % (aws_stack.get_region(), TEST_AWS_ACCOUNT_ID),  
                        'Enabled': False,
                    }
                },
                'Status': config_status
            },
            'SnapshotOptions': {
                'Options': {
                    'AutomatedSnapshotStartHour': randint(0, 23)
                },
                'Status': config_status
            },
            'VPCOptions': {
                'Options': {
                    'AvailabilityZones': [
                        'us-east-1b'
                    ],
                    'SecurityGroupIds': [
                        'sg-12345678'
                    ],
                    'SubnetIds': [
                        'subnet-12345678'
                    ],
                    'VPCId': 'vpc-12345678'
                },
                'Status': config_status
            }
        }
    }
def get_domain_status(domain_name, deleted=False):