* change line position for uuid and last_modified because they're not input parameters
* add event_source_arn validator and setter
* refactor batch_size as setter
* add helper function to parse arn and return source service
* fix for EventSource's create_from_cfn, there was no reference in the lambda object for the esm if created by cfn
* add esm deletion by cloudformation
* remove unused variable in test
* add cfn's update
* add complete implementation of delete_from_cfn
* blacked changed files
* fix test with invalid batchsize for sqs
* Dynamodb2 Table - Bugfix for localindex and implemented get_cfn_attributes
* Dynamodb2 eventsource - fix test to use StreamArn attribute
* Lambda Test - fix test_update_event_source_mapping
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