quick fix: change order of checks in operator

[PReithofer]

First check get_is_completed to make sure that agent and unit status is synced even if generator already finished.

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[JackUrb]

Accepted as a quick fix. Certainly brings to question whether this state syncing should be owned by _track_and_kill_runs in a poll-only manner. Given recent attempts to clean up state (#1037), it's possible that we end up in a better place soon.