Local Lambda endpoint sample code is broken

[alexcasalboni]

Description:

If you just copy-and-past this code and run it locally, it fails:

import boto3

if running_locally:

    lambda_client = boto3.client('lambda',
                                 endpoint_url="http://127.0.0.1:3001",
                                 use_ssl=False,
                                 verify=False,
                                 config=Config(signature_version=UNSIGNED,
                                               read_timeout=0,
                                               retries={'max_attempts': 0}))

Observed result: NameError and botocore.exceptions.NoRegionError are raised

Expected result: the code should run smoothly without any required change.

[jfuss]

Closing as PR was merged.