[{
    "pk": 1,
    "model": "conversation.Conversation",
    "fields": {
        "user": 1,
        "subject": "Test Conversation",
        "message": "Test message",
        "start_date": "2011-08-26",
        "start_time": "06:10",
        "groups": [1],
        "previewcontacts": [1]
    }
}]
[{
    "pk": 1,
    "model": "conversation.Conversation",
    "fields": {
        "user": 1,
        "subject": "Test Conversation",
        "message": "Test message",
        "start_date": "2011-08-26",
        "start_time": "06:10",
        "delivery_class": "sms",
        "groups": [1],
        "previewcontacts": [1]
    }
}]
Add delivery_class to conversation test fixture.
Add delivery_class to conversation test fixture.
