Steps to recreate:
1. create 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  
```
3. describe stream using the stream arn from step 2.
```
aws dynamodbstreams describe-stream --stream-arn "arn:aws:dynamodb:eu-central-1:000000000000:table/MusicCollection/stream/2019-09-21T14:06:37.345" --endpoint http://localhost:4570
```
localstack logs:

```
Traceback (most recent call last):
  File "/home/balrog/localstack/.venv/lib/python2.7/site-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/balrog/localstack/.venv/lib/python2.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/balrog/localstack/.venv/lib/python2.7/site-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/balrog/localstack/.venv/lib/python2.7/site-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/balrog/localstack/.venv/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/balrog/localstack/.venv/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/balrog/localstack/localstack/services/dynamodbstreams/dynamodbstreams_api.py", line 88, in post_request
    shard['ShardId'] = shard_id(stream_name, shard['ShardId'])
  File "/home/balrog/localstack/localstack/services/dynamodbstreams/dynamodbstreams_api.py", line 146, in shard_id
    return '-'.join([kinesis_shard_id, random_id(stream_arn, kinesis_shard_id)])
  File "/home/balrog/localstack/localstack/services/dynamodbstreams/dynamodbstreams_api.py", line 142, in random_id
    return uuid.uuid5(namespace, kinesis_shard_id).hex
  File "/usr/lib/python2.7/uuid.py", line 609, in uuid5
    hash = sha1(namespace.bytes + name).digest()
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe1 in position 4: ordinal not in range(128)
```
import json
import uuid
import hashlib
from flask import Flask, jsonify, request, make_response
from localstack.services import generic_proxy
from localstack.utils.aws import aws_stack
from localstack.utils.common import to_str, to_bytes
from localstack.utils.analytics import event_publisher
APP_NAME = 'ddb_streams_api'
app = Flask(APP_NAME)
DDB_STREAMS = {}
DDB_KINESIS_STREAM_NAME_PREFIX = '__ddb_stream_'
ACTION_HEADER_PREFIX = 'DynamoDBStreams_20120810'
SEQUENCE_NUMBER_COUNTER = 1
def add_dynamodb_stream(table_name, latest_stream_label, view_type='NEW_AND_OLD_IMAGES', enabled=True):