Reporting taxonomy value update: ms.service = container-service -> azure-kubernetes-service

Please see attached spreadsheet for azure-docs-sdk-java usage of the ms.service reporting taxonomy value **_container-service_**, which should be removed and replaced with the ms.service reporting taxonomy value **_azure-kubernetes-service_**. [azure-docs-sdk-java_container-service.xlsx](https://github.com/Azure/azure-docs-sdk-java/files/13368583/azure-docs-sdk-java_container-service.xlsx)