Add DataContract/DataMember Attributes to OData client

[KenitoInc]

ODataClient uses a custom OriginalNameAttribute

Related issues #554 #2099 A PR that is yet to be reviewed/merged #1169

Assemblies affected

Microsoft.OData.Client v7.x

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Expected result

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Actual result

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[corranrogue9]

John and Kennedy have some context around this. Link this to the JSON work item if applicable.