With today's update, API Gateway consistently fails to find any of its' defined paths.

For example, the following `serverless.yml` :
```yaml
service: "localtest"

provider:
  name: "aws"
  runtime: "nodejs10.x"

functions:
  hello:
    handler: "handler.hello"
    events:
      - http:
          path: "/"
          method: "get"
          integration: "lambda-proxy"
      - http:
          path: "/test"
          method: "get"
          integration: "lambda-proxy"
plugins:
  - "serverless-localstack"

custom:
  localstack:
    stages:
      - "local"
```

If deployed, will result in the following:
```
~$ sls deploy --stage local
Serverless: Using serverless-localstack
Serverless: Packaging service...
Serverless: Excluding development dependencies...
Serverless: Creating Stack...
Serverless: Checking Stack create progress...
.
Serverless: Stack create finished...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading artifacts...
Serverless: Uploading service localtest.zip file to S3 (3.02 KB)...
Serverless: Validating template...
Serverless: Skipping template validation: Unsupported in Localstack
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
.
Serverless: Stack update finished...
Service Information
service: localtest
stage: local
region: us-east-1
stack: localtest-local
resources: 11
api keys:
  None
endpoints:
  GET - http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/
  GET - http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/test
functions:
  hello: localtest-local-hello
layers:
  None
Serverless: Run the "serverless" command to setup monitoring, troubleshooting and testing.
~$ curl http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/
{"message": "Unable to find integration for path /restapis/sz3ijrff91/local/_user_request_/"}
~$ curl http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/test
{"message": "Unable to find integration for path /restapis/sz3ijrff91/local/_user_request_/test"}
```
SQS_PORT_EXTERNAL = int(os.environ.get('SQS_PORT_EXTERNAL') or 0)
LOCALSTACK_HOSTNAME = os.environ.get('LOCALSTACK_HOSTNAME', '').strip() or HOSTNAME
LAMBDA_REMOTE_DOCKER = os.environ.get('LAMBDA_REMOTE_DOCKER', '').lower().strip() in TRUE_VALUES
LAMBDA_DOCKER_NETWORK = os.environ.get('LAMBDA_DOCKER_NETWORK', '').strip()
LAMBDA_CONTAINER_REGISTRY = os.environ.get('LAMBDA_CONTAINER_REGISTRY', '').strip() or DEFAULT_LAMBDA_CONTAINER_REGISTRY
DATA_DIR = os.environ.get('DATA_DIR', '').strip()
TMP_FOLDER = os.path.join(tempfile.gettempdir(), 'localstack')
for folder in [DATA_DIR, TMP_FOLDER]:
    if folder and not os.path.exists(folder):
        try:
            os.makedirs(folder)
        except Exception:
            
            
            pass
if TMP_FOLDER.startswith('/var/folders/') and os.path.exists('/private%s' % TMP_FOLDER):
    TMP_FOLDER = '/private%s' % TMP_FOLDER
HOST_TMP_FOLDER = os.environ.get('HOST_TMP_FOLDER', TMP_FOLDER)
USE_SSL = os.environ.get('USE_SSL', '').strip() in TRUE_STRINGS
DEFAULT_ENCODING = 'utf-8'
DOCKER_SOCK = os.environ.get('DOCKER_SOCK', '').strip() or '/var/run/docker.sock'
DOCKER_FLAGS = os.environ.get('DOCKER_FLAGS', '').strip()
DOCKER_CMD = os.environ.get('DOCKER_CMD', '').strip() or 'docker'
START_WEB = os.environ.get('START_WEB', '').strip() not in FALSE_STRINGS
PORT_WEB_UI = int(os.environ.get('PORT_WEB_UI', '').strip() or DEFAULT_PORT_WEB_UI)
PORT_WEB_UI_SSL = PORT_WEB_UI + 1
DOCKER_BRIDGE_IP = os.environ.get('DOCKER_BRIDGE_IP', '').strip()
EXTRA_CORS_ALLOWED_HEADERS = os.environ.get('EXTRA_CORS_ALLOWED_HEADERS', '').strip()
EXTRA_CORS_EXPOSE_HEADERS = os.environ.get('EXTRA_CORS_EXPOSE_HEADERS', '').strip()
def has_docker():