We are having an issue with the latest image of localstack (bc991b0bc3ce).
While creating an SQS and setting parameters we experience the following error:

```
localstack_1        | 2019-09-09T10:46:22:ERROR:localstack.services.generic_proxy: Error forwarding request: 'QueueUrl' Traceback (most recent call last):
localstack_1        |   File "/opt/code/localstack/localstack/services/generic_proxy.py", line 234, in forward
localstack_1        |     path=path, data=data, headers=forward_headers)
localstack_1        |   File "/opt/code/localstack/localstack/services/sqs/sqs_listener.py", line 53, in forward_request
localstack_1        |     self._set_queue_attributes(req_data)
localstack_1        |   File "/opt/code/localstack/localstack/services/sqs/sqs_listener.py", line 245, in _set_queue_attributes
localstack_1        |     queue_url = req_data['QueueUrl'][0]
localstack_1        | KeyError: 'QueueUrl'
```

From the logs I guess the `QueueUrl` is expected and it's not there. We don't see this behaviour in the last version (0.10.2).

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import re
import uuid
import xmltodict
from six.moves.urllib import parse as urlparse
from six.moves.urllib.parse import urlencode
from requests.models import Request, Response
from localstack import config
from localstack.config import HOSTNAME_EXTERNAL, SQS_PORT_EXTERNAL
from localstack.utils.common import to_str, md5
from localstack.utils.analytics import event_publisher
from localstack.services.awslambda import lambda_api
from localstack.utils.aws.aws_stack import extract_region_from_auth_header
from localstack.services.generic_proxy import ProxyListener
XMLNS_SQS = 'http://queue.amazonaws.com/doc/2012-11-05/'
SUCCESSFUL_SEND_MESSAGE_XML_TEMPLATE = """
    <?xml version="1.0"?>
    <SendMessageResponse xmlns="%s">
        <SendMessageResult>
            <MD5OfMessageAttributes>{message_attr_hash}</MD5OfMessageAttributes>
            <MD5OfMessageBody>{message_body_hash}</MD5OfMessageBody>
            <MessageId>{message_id}</MessageId>
        </SendMessageResult>
        <ResponseMetadata>
            <RequestId>00000000-0000-0000-0000-000000000000</RequestId>