Strip "Model" from setter funcName

When using model associations in seedData.json files, grunt db:seed fails:
**TypeError: Property 'set[model name]Model' of object [object Object] is not a function**

Here is a sample of the issue:

./modules/clever-orm/config/default.json
```
"modelAssociations": {
  "SubscriptionModel": {
    "hasMany": ["AccountModel"]
  },
  "AccountModel": {
    "belongsTo": ["SubscriptionModel"]
  }
}
```

./modules/.../seedData.json
```
{
    "SubscriptionModel": [
        {
            "name": "Trial",
            "description": "30 days trial subscription"
        },
        {
            "name": "Annual Subscription",
            "description": "Annual Subscription"
        }
    ],

    "AccountModel": [
        {
            "name": "Default Account",
            "associations": {
                "SubscriptionModel": {"name": "Annual Subscription"}
            }
        }
    ],
}
```

```
$grunt db:seed
...
TypeError: Property 'setSubscriptionModel' of object [object Object] is not a function
```

This PR is just a quick fix, while a permanent fix is in place.