fixes #2816: Set the response version to delta response and delta patch response

[xuzhg]

Issues

This pull request fixes #2816.

Description

Currently, ODataVersion.4.01 is hard coded for all delta response. So, customer can't switch between 4.0 and 4.01.

However, it may be true for delta patch since it's only included in OData version 4.01, but not in OData version 4.0. For other delta responses, it should be valid in both versions.

This PR is to change to 4.01 only for delta patch response but use the version setting for other delta response.

Checklist (Uncheck if it is not completed)

• Test cases added
• Build and test with one-click build and test script passed

Additional work necessary

If documentation update is needed, please add "Docs Needed" label to the issue and provide details about the required document change in the issue.

[mikepizzo]

LGTM!

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[ElizabethOkerio]

What's the internal request method of a normal delta response? Isn't it Patch also?

[ElizabethOkerio]

or this is for other methods like GET etc

[xuzhg]

That's 'Get', right?!

[mikepizzo]

PATCH is the verb used when the client is doing a delta (aka bulk) update.

The delta response payload is also used when the client retrieves changes using the deltaLink using GET.

Bulk updates are only supported for 4.01, so it's appropriate for the response from a delta update to be 4.01, but a request to get changes (which also returns in delta format) has been around since 4.0, and is valid in either 4.0 or 4.01 format.