When I "PUT" an object using a pre-signed by localstack S3 URL, the localstack responds with "Content Length: 233" and `<PutObjectResponse>...</PutObjectResponse>` XML in the body. 

When I run the same code against AWS S3, the content length is 0 and response body blank. Would be great if localstack matched the AWS S3 response.

Running the latest 0.9.3 localstack docker image.
import re
import logging
import json
import uuid
import base64
import codecs
import xmltodict
import collections
import botocore.config
import six
import datetime
import dateutil.parser
from six import iteritems