Glcc OpenAPI Swagger base model

[heliang666s]

What is the purpose of the change

Glcc OpenAPI Swagger base model

Brief changelog

1. add getOpenAPISchema in MetadataService
2. implement the method in MetadataServiceDelegation
3. add a cache map in DefaultRequestMappingRegistry to restore register infomation
4. add OpenAPIGenerator to gennerate OpenAPI(Half done)
5. fix ConfigurableMetadataServiceExporter , so that it cloud be accessed by the user on a REST API.
6. copy swagger-model from Swagger-core

Verifying this change

No

Checklist

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