Enforce match timeouts when calling agents

[bovard]

Before we would wait forever for a agent to return, THEN check and enforce the timeouts. If the agent died we would hang forever waiting for it.

Verified that this works locally:

[{"action": "", "info": {}, "observation": {"board": "rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq h3 0 1", "mark": "white", "opponentRemainingOverageTime": 10, "remainingOverageTime": 10, "step": 2}, "reward": 0, "status": "DONE"}, {"action": null, "info": {}, "observation": {"board": "rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq h3 0 1", "mark": "black", "opponentRemainingOverageTime": 10, "remainingOverageTime": -10.048537999999997}, "reward": null, "status": "TIMEOUT"}]

remainingOverageTime is -10 seconds and status is TIMEOUT which is what should be expected

[lipovetz]

LGTM