dynamodbstreams describe-stream shows stream not found but the stream is there in list-streams

Steps to recreate:
1. create dynamodb table, 
```
aws dynamodb create-table --table-name MusicCollection --attribute-definitions AttributeName=Artist,AttributeType=S AttributeName=SongTitle,AttributeType=S --key-schema AttributeName=Artist,KeyType=HASH AttributeName=SongTitle,KeyType=RANGE --provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5 --endpoint http://localhost:4569
```

2. add stream
```
aws dynamodb update-table --table-name MusicCollection --stream-specification StreamEnabled=true,StreamViewType=NEW_IMAGE --endpoint http://localhost:4569
{
    "TableDescription": {
        "TableArn": "arn:aws:dynamodb:eu-central-1:000000000000:table/MusicCollection", 
        "AttributeDefinitions": [
            {
                "AttributeName": "Artist", 
                "AttributeType": "S"
            }, 
            {
                "AttributeName": "SongTitle", 
                "AttributeType": "S"
            }
        ], 
        "ProvisionedThroughput": {
            "NumberOfDecreasesToday": 0, 
            "WriteCapacityUnits": 5, 
            "LastIncreaseDateTime": 0.0, 
            "ReadCapacityUnits": 5, 
            "LastDecreaseDateTime": 0.0
        }, 
        "TableSizeBytes": 0, 
        "TableName": "MusicCollection", 
        "TableStatus": "ACTIVE", 
        "StreamSpecification": {
            "StreamViewType": "NEW_IMAGE", 
            "StreamEnabled": true
        }, 
        "LatestStreamLabel": "2019-09-21T10:47:14.246", 
        "KeySchema": [
            {
                "KeyType": "HASH", 
                "AttributeName": "Artist"
            }, 
            {
                "KeyType": "RANGE", 
                "AttributeName": "SongTitle"
            }
        ], 
        "ItemCount": 0, 
        "CreationDateTime": 1569062831.736, 
        "LatestStreamArn": "arn:aws:dynamodb:eu-central-1:000000000000:table/MusicCollection/stream/2019-09-21T10:47:14.246"
    }
}
```
3. Note LatestStreamARN from output ```"LatestStreamArn": "arn:aws:dynamodb:eu-central-1:000000000000:table/MusicCollection/stream/2019-09-21T10:47:14.246"```

4. List streams:
```
aws dynamodbstreams list-streams --endpoint http://localhost:4570                                                                                                                  
{
    "LastEvaluatedStreamArn": "TODO", 
    "Streams": [
        {
            "TableName": "MusicCollection", 
            "StreamArn": "arn:aws:dynamodb:eu-central-1:000000000000:table/MusicCollection/stream/2019-09-21T10:47:16", 
            "StreamLabel": "TODO"
        }
    ]
}
```
5. Compare StreamARN to step 3.

Expected behavior: they should match (AWS dynamodb/streams behavior)
stream = data['StreamSpecification']
    enabled = stream.get('StreamEnabled')
    if enabled not in [False, 'False']:
        table_name = data['TableName']
        view_type = stream['StreamViewType']
        dynamodbstreams_api.add_dynamodb_stream(table_name=table_name,
            view_type=view_type, enabled=enabled)
def forward_to_lambda(records):
    for record in records:
        sources = lambda_api.get_event_sources(source_arn=record['eventSourceARN'])
        event = {
            'Records': [record]
        }
        for src in sources:
            lambda_api.run_lambda(event=event, context={}, func_arn=src['FunctionArn'])
def forward_to_ddb_stream(records):
    dynamodbstreams_api.forward_events(records)
def dynamodb_extract_keys(item, table_name):
    result = {}
    if table_name not in TABLE_DEFINITIONS:
        LOGGER.warning('Unknown table: %s not found in %s' % (table_name, TABLE_DEFINITIONS))
        return None
    for key in TABLE_DEFINITIONS[table_name]['KeySchema']:
        attr_name = key['AttributeName']
        if attr_name not in item:
            return error_response(error_type='ValidationException',
                message='One of the required keys was not given a value')
        result[attr_name] = item[attr_name]
    return result
def error_response(message=None, error_type=None, code=400):