Add correctResponsesPattern to object definition

[rpc5102]

Accepts: An Array of Strings.

"object": {
    "id": "http://adlnet.gov/expapi/activities/example",
    "definition": {
        "name": {
            "en-US": "Example Activity"
        },
        "description": {
            "en-US": "Example activity description"
        },
        "type": "http://adlnet.gov/expapi/activities/cmi.interaction",
        "interactionType": "numeric",
        "correctResponsesPattern": [
            "1"
        ]
    },
    "objectType": "Activity"
}