Merge some metadata classes

[Wraith2]

Another small set of merges. No noteworthy changes.

[cheenamalhotra]

LGTM!
Small note for reviewing team:

• There's a virtual Close method in netfx class SmiRecordBuffer, implemented in TdsRecordSetterBuffer.cs but is unused, seems to be safe for deletion, as netcore version of files are chosen.

[cheenamalhotra]

Just FYI..
We're looking into pipeline trigger issues recently happening, will let you know when we'd need a push on this branch to trigger CI builds again.

[cheenamalhotra]

The pipelines are back, could you try pushing an update to your PR?
e.g. "merge" from "dotnet/master"?

[Wraith2]

I looked at the Close implementation and originally pulled it into the netcore version but later tracing through what it did I realised it was totally dead code and re-removed it. So I did the due diligence even though it looks like I just took netcore.

Pipelines seem to be passed now...

[cheenamalhotra]

Yep I got that, just wanted to call out changes in case that raises questions.
FYI, the pipelines were not triggered, you'll have to check-in something for checks to run.

[Wraith2]

turned it off and then turned it on again, that triggered it 😁

[Wraith2]

The test failures are from a changed localized message that's being tested for directly. That seems a bit fragile and it isn't related to the changes that I've made in this PR.

[JRahnama]

LGTM.