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# Type of request: This is a ...

[ x ] bug report
[ ] feature request

# Detailed description

When I try to list stacks and filter the stack status, it lists all the stacks rather than filter them out.

I saw someone had this issue before and was meant to be fixed, but doesnt seem like its fixed:
- https://github.com/localstack/localstack/issues/2698

## Expected behavior

Stacks should be filtered


## Actual behavior

All stacks are returned

# Steps to reproduce

Run latest docker version of localstack.
Create new stack
Try to run something like:
aws --endpoint-url=http://localhost:4566 cloudformation list-stacks --stack-status-filter DELETE_FAILED

It will return all stacks when it should return an empty list

## Command used to start LocalStack
docker run --network host -d -e DEFAULT_REGION="eu-west-1" localstack/localstack:latest

## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)
aws --endpoint-url=http://localhost:4566 cloudformation list-stacks --stack-status-filter DELETE_FAILED

Using boto3, the same thing happens:
response = self.__cloudformation_client.list_stacks(StackStatusFilter=['CREATE_FAILED'])

...

import json
import logging
import traceback
import xmltodict
from flask import Flask, request
from requests.models import Response
from localstack.utils.aws import aws_stack, aws_responses
from localstack.utils.common import (
    parse_request_data, short_uid, long_uid, clone, clone_safe, select_attributes,
    timestamp_millis, recurse_object)
from localstack.utils.cloudformation import template_deployer, template_preparer
from localstack.services.generic_proxy import RegionBackend
from localstack.utils.aws.aws_responses import (
    requests_response_xml, requests_to_flask_response, flask_error_response_xml, extract_url_encoded_param_list)
APP_NAME = 'cloudformation_api'
app = Flask(APP_NAME)
LOG = logging.getLogger(__name__)
XMLNS_CF = 'http://cloudformation.amazonaws.com/doc/2010-05-15/'
class CloudFormationRegion(RegionBackend):