[CustomDbEngineVersion] Add new parameters in CEV

[0ooopsFibby]

Issue #, if available: N / A

Description of changes:

Latest AWS RDS SDK has added three optional parameters for CEV model and originally required field is now no longer compulsory. This PR is to add the additional parameters to CFN accordingly.

Tests:

• unit tests covered by default (doesn't require changes as it was generated based on model)
• contract tests have passed locally

  curl -XPOST "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{ "TypeName": "AWS::RDS::CustomDBEngineVersion", "Bucket": "jiayuwa-cfn", "Key": "aws-service-resource-cev.zip", "TestDetails":["TestCreate,test_create_list", "TestCreate,test_create_create", "TestRead,test_governance", "TestRead,test_read_return_write_only_properties", "TestRead,test_read_return_readonly_properties", "TestDelete,test_delete_read", "TestDelete,test_delete_delete", "TestDelete,test_delete_list", "TestUpdate,test_update_read", "TestUpdate,test_update_list", "TestRead,test_read_return_all_schema_properties_using_one_or_more_inputs"] }' 

  test_read_input_output_negative_match from contract test doesn't apply for the API, this is because some parameters are not supposed to be used together (e.g. S3 bucket and source CEV). This particular test will fail with below if enabled.

  "Invalid Inputs: not all the properties defined in the schema are specified": true

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[0ooopsFibby]

Can you kindly confirm if all possible exceptions have been taken care of?

if the SourceCustomDBEngineVersionIdentifier or ImageId is not found or in an inappropriate state for the operation, what specific exceptions will be thrown?

Moreover, It will need to be associated with a recognized error from CloudFormation by adding it to the CreateHandler error role set, otherwise It will lead to an internal failure on the customer's end.

Yes I checked exceptions that could be thrown from the latest change, all have been covered by existing CreateHandler exceptions:

• InvalidParameterValue
• InvalidParameterCombination
• AccessDenied
• KMSKeyNotAccessibleFault

[0ooopsFibby]

• "s3:GetObject"

Thanks for the reminder! I do need to add additional permissions.

[zrfr]

Superseded by https://github.com/aws-cloudformation/aws-cloudformation-resource-providers-rds/pull/515