Add data element to PlayerSchema

[todo]

This element needs to be added to the PlayerSchema of the player-service.

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connection/server/models/Player.js

Lines 11 to 16 in 104dc51

	* @todo Add data element to PlayerSchema
	* @body This element needs to be added to the PlayerSchema of the player-service.
	*/
	data: { type: Object, default: {} }
	});

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This issue was generated by todo based on a todo comment in 104dc51 when #3 was merged. cc @ShipyardSuite.