Basket Service has no model Validation using grpc service

[ChrisFist]

As @ravividap stated in issue #1957 an open issue in grpc-dotnet repo prevents models/messages validation for Update Basket service due to open issue grpc/grpc-dotnet#741.

I keep this issue only open, so that the message validation for UpdateBasket via grpc is extended after closing grpc/grpc-dotnet#741. Otherwise I suggest to do validation on repositrory level.

[erjain]

Hi @ChrisFist, Sure, I have labeled this issue on hold for now.