[servicebus sdk] missing name on entities datamodel returned from admin client

[serbrech]

Bug Report

admin client seem to be missing some properties when getting entities.

in .net the entity types contain name, and systemdata :
https://github.com/Azure/azure-sdk-for-net/blob/c92daee4c73eb7cbeb8f7b4ac461dd07710e2f73/sdk/servicebus/Azure.ResourceManager.ServiceBus/src/Generated/Models/ServiceBusSubscriptionData.Serialization.cs#L100-L103

in go there isn't even the name, only the properties struct :

return &CreateSubscriptionResponse{
		RawResponse: resp,
		CreateSubscriptionResult: CreateSubscriptionResult{
			SubscriptionProperties: *newProps,
		},
	}, nil

azure-sdk-for-go/sdk/messaging/azservicebus/admin/admin_client_subscription.go

Line 18 in 893c1d2

type SubscriptionProperties struct {

• import path of package in question, e.g. .../services/compute/mgmt/2018-06-01/compute
• SDK version e.g. master, latest, 18.1.0
  • Specify the exact commit if possible; one way to get this is the REVISION
    column output by dep status "github.com/Azure/azure-sdk-for-go.
• output of go version

• What happened?
• What did you expect or want to happen?
• How can we reproduce it?
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