Two commands are being added:
- ImportDatastoreCommand starts an async import operation.
User may choose to wait until import completes or quit
immediately.
- GetOperationStatusCommand checks the status of an operation.
It may be used to check the status of an operation started by
ImportDatastoreCommand.
Both commands communicate with Datastore admin api directly, without
going through the Registry server.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=228400059
