# Type of request: This is a ...

[x] bug report
[ ] feature request

# Detailed description

Calls to `DescribeStreamConsumer` for the Kinesis service do not return the registered consumer. Calls to `ListStreamConsumers` does correctly show registered consumers.

Filing this issue to document this bug. It looks like `kinesis_listener.py` has mixed naming of `StreamARN` and `StreamArn`, I'll create a PR to fix this evening.

## Expected behavior

Returns registered consumer when queried by stream ARN + consumer name, and stream ARN+ consumer ARN.

## Actual behavior

The returned error is HTTP 400, "Consumer <consumer_name/arn> not found."

# Steps to reproduce

## Command used to start LocalStack

```
SERVICES=kinesis docker-compose up
```
## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

```
# Setup a stream and register a consumer
awslocal kinesis create-stream --stream-name "test-stream" --shard-count 1
STREAM_ARN=$(awslocal kinesis describe-stream \
    --stream-name "test-stream" \
    --query StreamDescription.StreamARN \
    --output text)
awslocal kinesis register-stream-consumer \
    --stream-arn "$STREAM_ARN" \
    --consumer-name "test-consumer"

# Call by consumer name fails:
awslocal kinesis describe-stream-consumer \
  --stream-arn "$STREAM_ARN" \
  --consumer-name "test-consumer"

# Call by consumer ARN also fails:
awslocal kinesis describe-stream-consumer \
  --stream-arn "$STREAM_ARN" \
  --consumer-arn "$STREAM_ARN/consumer/test-consumer"
```

body = {'message': msg,
        '__type': type_error}
    return encoded_response(body, encoding_type, code)
def kinesis_error_response(data, action):
    error_response = Response()
    if action == 'PutRecord':
        error_response.status_code = 400
        content = {
            'ErrorCode': 'ProvisionedThroughputExceededException',
            'ErrorMessage': 'Rate exceeded for shard X in stream Y under account Z.'
        }
    else:
        error_response.status_code = 200
        content = {'FailedRecordCount': 1, 'Records': []}
        for record in data.get('Records', []):
            content['Records'].append({
                'ErrorCode': 'ProvisionedThroughputExceededException',
                'ErrorMessage': 'Rate exceeded for shard X in stream Y under account Z.'
            })
    error_response._content = json.dumps(content)
    return error_response
UPDATE_KINESIS = ProxyListenerKinesis()