Create an index on beer sample

beer-sample does not have an index. This makes it unusable out of the box:

{{cbq> select * from `beer-sample` limit 1;
{
"requestID": "90495e2b-a2b6-4b35-adbe-6540ab9f7532",
"errors": [

{ "code": 4000, "msg": "No primary index on keyspace beer-sample. Use CREATE PRIMARY INDEX to create one." }

],
"status": "fatal",
"metrics":

{ "elapsedTime": "56.196153ms", "executionTime": "55.669987ms", "resultCount": 0, "resultSize": 0, "errorCount": 1 }

}
}}