# 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"
```

for consumer in STREAM_CONSUMERS:
        if consumer_arn and consumer_arn == consumer.get('ConsumerARN'):
            return consumer
        elif consumer_name == consumer.get('ConsumerName') and stream_arn == consumer.get('StreamArn'):
            return consumer
def find_stream_for_consumer(consumer_arn):
    kinesis = aws_stack.connect_to_service('kinesis')
    for stream_name in kinesis.list_streams()['StreamNames']:
        stream_arn = aws_stack.kinesis_stream_arn(stream_name)
        for cons in kinesis.list_stream_consumers(StreamARN=stream_arn)['Consumers']:
            if cons['ConsumerARN'] == consumer_arn:
                return stream_name
    raise Exception('Unable to find stream for stream consumer %s' % consumer_arn)
def simple_error_response(msg, code, type_error, encoding_type=APPLICATION_JSON):