Commented Issue: DataServiceVersion in $metadata should be 3.0 instead of 1.0 [496]

The attribute Indicates the version of the OData annotations used in the service metadata document. Client will use this value to check if it can read the document. Since we support inheritance and actions in OData v3, we should make the version to 3.0 as well.
Comments: We should update the version to 3.0 if ASR works with it.