Get CoreOS data from stream

[zaneb]

The file data/data/rhcos.json no longer exists (replaced by
data/data/coreos/rhcos.json). If the installer binary is able to output
the new (stream) file, use that. Only fall back to using the old file
for older releases.

[openshift-ci]

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[hardys]

We already create this file via print-stream-json here so we could perhaps only copy if the "old" file location is found here?

I actually found this issue a few days ago but forgot to push the patch (apologies!) hardys@c4b30ff so if you agree that approach is preferable I can just create a PR, or we can go with this approach.

[zaneb]

I didn't bother to check in to how those two scripts interact. I assume you know what you're doing, so your fix is preferable since it's simpler :) Happy to close this one.

[hardys]

I don't have a strong preference, but with my approach we avoid running the openshift-install command twice, which I guess may be slightly faster and less noisy in the logs - it also means we can remove the copy completely when 4.7 reaches EOL.

I pushed #1317 - if you're happy with that we can close this one.

[zaneb]

/close

[openshift-ci]

@zaneb: Closed this PR.

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/close

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