Testing support 'containsArray' keyword in where clause

I'm testing the implementation of the keyword 'containsArray' in where clause.
Find subarray value in array field

```
'containsArray': function _containsArray(r, row, field, value) {
    return row(field).default([]).setIntersection(r.expr(value).default([])).count().eq(value.length);
 }
```

```
where: {
    tags: {
         containsArray: ['tag1','tag2']
     }
}
```
