[Systems] Battleship Athos has the wrong model

[Spectre]

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Type: Systems
Bug: See title
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Not so much a bug as it is an oversight.
Battleship Athos used the Osiris model during the Battle of New London so that texture conflicts did not occur with the Liberty Dreadnought model, which the Murmillo model is known to do. As this is long since over, and the issue may even be fixed (I'm not sure on this, don't quote me), the temporary model fix should be swapped back for consistency.

[Markam]

Fixed on patch.

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Markam is evil