Localstack 0.10.3.2 fails to import lambda function python module on Mac:

{
E             "errorType": "Runtime.ImportModuleError",
E             "errorMessage": "Unable to import module 'get_assessment/handler': No module named 'get_assessment/handler'"
E           } Traceback (most recent call last):
E             File "/opt/code/localstack/localstack/services/awslambda/lambda_api.py", line 338, in run_lambda
E               event, context=context, version=version, asynchronous=asynchronous)
E             File "/opt/code/localstack/localstack/services/awslambda/lambda_executors.py", line 83, in execute
E               return do_execute()
E             File "/opt/code/localstack/localstack/services/awslambda/lambda_executors.py", line 68, in do_execute
E               result, log_output = self._execute(func_arn, func_details, event, context, version)
E             File "/opt/code/localstack/localstack/services/awslambda/lambda_executors.py", line 229, in _execute
E               result, log_output = self.run_lambda_executor(cmd, stdin, environment)
E             File "/opt/code/localstack/localstack/services/awslambda/lambda_executors.py", line 149, in run_lambda_executor
E               (return_code, log_output))
E      

It works fine with 0.10.3.1. The error is caused by the line 55-57 move down to the end of file licalstack/config.py:
```
 if TMP_FOLDER.startswith('/var/folders/') and os.path.exists('/private%s' % TMP_FOLDER):
    TMP_FOLDER = '/private%s' % TMP_FOLDER
```
These lines setup Mac TMP folder. Why these lines were moved?

try:
        with open(os.devnull, 'w') as devnull:
            subprocess.check_output('docker ps', stderr=devnull, shell=True)
        return True
    except Exception:
        return False
def is_linux():
    try:
        out = subprocess.check_output('uname -a', shell=True)
        out = out.decode('utf-8') if isinstance(out, six.binary_type) else out
        return 'Linux' in out
    except subprocess.CalledProcessError:
        return False
LAMBDA_EXECUTOR = os.environ.get('LAMBDA_EXECUTOR', '').strip()
if not LAMBDA_EXECUTOR:
    LAMBDA_EXECUTOR = 'docker'
    if not has_docker():
        LAMBDA_EXECUTOR = 'local'
LAMBDA_FALLBACK_URL = os.environ.get('LAMBDA_FALLBACK_URL', '').strip()
CONFIG_ENV_VARS = ['SERVICES', 'HOSTNAME', 'HOSTNAME_EXTERNAL', 'LOCALSTACK_HOSTNAME', 'LAMBDA_FALLBACK_URL',
                   'LAMBDA_EXECUTOR', 'LAMBDA_REMOTE_DOCKER', 'LAMBDA_DOCKER_NETWORK', 'USE_SSL', 'DEBUG',
                   'KINESIS_ERROR_PROBABILITY', 'DYNAMODB_ERROR_PROBABILITY', 'PORT_WEB_UI', 'START_WEB',
                   'DOCKER_BRIDGE_IP', 'DEFAULT_REGION', 'LAMBDA_JAVA_OPTS', 'LOCALSTACK_API_KEY']
for key, value in six.iteritems(DEFAULT_SERVICE_PORTS):
    clean_key = key.upper().replace('-', '_')
    CONFIG_ENV_VARS += [clean_key + '_BACKEND', clean_key + '_PORT', clean_key + '_PORT_EXTERNAL']
CONFIG_ENV_VARS += ['LOCALSTACK_' + v for v in CONFIG_ENV_VARS]
def ping(host):