now can use `ansible-test units module_name` for the aws_s3 and aws_api_gateway modules
changes to modules/cloud/amazon/aws_api_gateway and modules/cloud/amazon/aws_s3 are not triggering the unit tests; also fix aws_s3 from importing non-exist module and skipping tests
changes to module_utils/aws/core.py are only being unit tested on modules that import from the file (if they have a corresponding test) or tests that import from the file themselves.
* move set_module_args to units.modules.utils
* unit tests: reuse set_module_args
* unit tests: mock exit/fail_json in module.utils.ModuleTestCase
* unit tests: use module.utils.ModuleTestCase
* unit tests: fix 'import shadowed by loop variable'
* Ultra basic api-gateway module based of lambda.py
* Ultra basic deployment added to api-gateway module
* ApiGateway module Allow creation of APIs, more documentation and better return value
* ApiGateway module incorporate review feedback
* ApiGateway module flake8 cleanup
* APIGateway module - more review fixes.
* slightly better messages in api_gateway module
* AWS api_gateway module - try to improve messages in case of exceptions
* rename api_gateway module to aws_api_gateway as discussed in PR 20230
* aws_api_gateway - Allow delivery of swagger either as text or dictionary.
* aws_api_gateway module - introduce 'unit' tests, improve imports using them and small fixes
* aws_api_gateway module - move path expand_user to avoid early typecheck
* aws_api_gateway - version means version of metadata not module - fix to 1.0
* aws_api_gateway module - Rely on module_utils.ec2 for imports & path type for expanduser / cleanups
* aws_api_gateway module - heavy cleanup and refactor of code + cloud retry functionality.
* api_gateway_module - failing test case for handling more than one deployment in succession and API deletion
* add TooManyRequestsException to AWSRetry exception list - makes API deployment work.
* api_gateway_module - Fixes for various review comments + errors from various linters
* api_gateway_module - Fixes for more review comments + linter error
* api_gateway_module - Major refactor into sensible functions - create_response becomes configure_response
* api_gateway_module - should be working under python3; remove test exclusion
* api_gateway_module - finish off remaining review fixes - use ansible defaults and fix mutually exclusive
* api_gateway_module - attempt to improve handling of botocore errors in python3
* api_gateway_module - implement state=absent / API deletion
