Test usage of empty stdClass.
Test usage of empty stdClass.

In method FunctionScoreQueryTest::addRandomFunction.

ongr-io/ElasticsearchDSL,abhiesa-tolexo/ElasticsearchDSL,mansimas/ElasticsearchDSL,tadcka/ElasticsearchDSL,asev/ElasticsearchDSL,saimaz/ElasticsearchDSL